diff --git a/.jazzy.yaml b/.jazzy.yaml
index a2d6903..45c1c8a 100644
--- a/.jazzy.yaml
+++ b/.jazzy.yaml
@@ -16,7 +16,6 @@ custom_categories:
     children:
     - "Installation"
     - "Micro Example"
-    - "License"
   - name: "Usage"
     children:
     - "Initialization"
diff --git a/Documentation/Getting Started.md b/Documentation/Getting Started.md
index 5f64fb2..fa35897 100644
--- a/Documentation/Getting Started.md	
+++ b/Documentation/Getting Started.md	
@@ -1,6 +1,6 @@
 If you haven't already, I highly recommend your read the *Overview* and *Preparing* section of Apple's [In-App Purchase official documentation](https://developer.apple.com/in-app-purchase).
 
-## Requirements
+# Requirements
 * Configure your App and Xcode to support In-App Purchases.
   * [AppStore Connect Setup](https://help.apple.com/app-store-connect/#/devb57be10e7)
 * Create and configure your [Fovea.Billing](https://billing.fovea.cc/?ref=iap-swift-lib) project account:
diff --git a/Documentation/Getting Started/Installation.md b/Documentation/Getting Started/Installation.md
index 5a88938..6f01bac 100644
--- a/Documentation/Getting Started/Installation.md	
+++ b/Documentation/Getting Started/Installation.md	
@@ -1,14 +1,21 @@
 # Installation
-<p align="center">
-  <img src="img/ScreenshotInstallation.png" title="Installation">
-</p>
 
 * Select your project in Xcode
 * Go to the section *Swift Package*
 * Click on *(+) Add Package Dependency*
+
+<p align="center">
+  <img src="img/ScreenshotInstallation.png" title="ScreenshotInstallation">
+</p>
+
 * Copy the Git URL: *https://github.com/iridescent-dev/iap-swift-lib.git*
-* Click on *Next* > *Next*
+* Click on *Next*
+* In *Rules* select *Version: Up to Next Major ...*
+* Click on *Next*
+
+<p align="center">
+  <img src="img/ScreenshotInstallation2.png" title="ScreenshotInstallation2">
+</p>
+
 * Make sure your project is selected in *Add to target*
 * Click on *Finish*
-
-*Note:* You have to `import InAppPurchaseLib` wherever you use the library.
diff --git a/Documentation/Getting Started/Micro Example.md b/Documentation/Getting Started/Micro Example.md
index 2491fe3..bf4a23a 100644
--- a/Documentation/Getting Started/Micro Example.md	
+++ b/Documentation/Getting Started/Micro Example.md	
@@ -20,7 +20,7 @@ class AppDelegate: UIResponder, UIApplicationDelegate {
   }
 
   func applicationWillTerminate(_ application: UIApplication) {
-    // Clean
+    // Stop library when the application will terminate
     InAppPurchase.stop()
   }
 }
@@ -71,6 +71,7 @@ class ViewController: UIViewController {
     }
   }
 
+  // Initiating a purchase
   @IBAction func purchase(_ sender: Any) {
     self.loaderView.show()
     InAppPurchase.purchase(
@@ -80,6 +81,7 @@ class ViewController: UIViewController {
       })
   }
 
+  // Restoring purchases
   @IBAction func restorePurchases(_ sender: Any) {
     self.loaderView.show()
     InAppPurchase.restorePurchases(callback: { result in
diff --git a/Documentation/License.md b/Documentation/License.md
deleted file mode 100644
index ce44199..0000000
--- a/Documentation/License.md
+++ /dev/null
@@ -1,21 +0,0 @@
-MIT License
-
-Copyright (c) 2020 Iridescent
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/Documentation/Usage/Displaying products with purchases.md b/Documentation/Usage/Displaying products with purchases.md
index 0ec900c..75c11e7 100644
--- a/Documentation/Usage/Displaying products with purchases.md	
+++ b/Documentation/Usage/Displaying products with purchases.md	
@@ -1,10 +1,10 @@
 # Displaying products with purchases
 In your store screen, where you present your products titles and prices with a purchase button, there are some cases to handle that we skipped. Owned products and deferred purchases.
 
-### Owned products
-Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to `InAppPurchase.hasActivePurchase()` to and to the example later in this section.
+## Owned products
+Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to `InAppPurchase.hasActivePurchase()` to the example later in this section.
 
-### Deferred purchases
+## Deferred purchases
 Apple's **Ask to Buy** feature lets parents approve any purchases initiated by children, including in-app purchases.
 
 With **Ask to Buy** enabled, when a child requests to make a purchase, the app is notified that the purchase is awaiting the parent’s approval in the purchase callback:
@@ -28,7 +28,7 @@ We will use the `hasDeferredTransaction` method:
 InAppPurchase.hasDeferredTransaction(for productIdentifier: String) -> Bool
 ```
 
-### Example
+## Example
 Here's an example that covers what has been discussed above. We will update our example `refreshView` function from before:
 
 ``` swift
diff --git a/Documentation/Usage/Displaying products.md b/Documentation/Usage/Displaying products.md
index 83c71b0..07a4233 100644
--- a/Documentation/Usage/Displaying products.md	
+++ b/Documentation/Usage/Displaying products.md	
@@ -1,13 +1,13 @@
 # Displaying products
 Let's start with the simplest case: you have a single product.
 
-You can retrieve all information about this product using the function `InAppPurchase.getProductBy(identifier: "my_product_id")`. This returns an [SKProduct](https://developer.apple.com/documentation/storekit/skproduct) extended with helpful methods.
+You can retrieve all information about this product using the function `InAppPurchase.getProductBy(identifier: "my_product_id")`. This returns an [SKProduct](https://developer.apple.com/documentation/storekit/skproduct) extended with [helpful methods](Extensions/SKProduct.html).
 
 Those are the most important:
  - `productIdentifier: String` - The string that identifies the product to the Apple AppStore.
  - `localizedTitle: String` - The name of the product, in the language of the device, as retrieved from the AppStore.
  - `localizedDescription: String` - A description of the product, in the language of the device, as retrieved from the AppStore.
- - `localizedPrice: String` - The cost of the product in the local currency (_read-only property added by this library_).
+ - `localizedPrice: String` - The cost of the product in the local currency (_read-only property added by this library, available for OSX >= 10.13.2 and iOS >= 11.2_).
 
 *Example*:
 
diff --git a/Documentation/Usage/Displaying subscriptions.md b/Documentation/Usage/Displaying subscriptions.md
index 0094c2e..46938b2 100644
--- a/Documentation/Usage/Displaying subscriptions.md	
+++ b/Documentation/Usage/Displaying subscriptions.md	
@@ -1,5 +1,13 @@
 # Displaying subscriptions
-For subscription products, you also have some data about subscription periods and introductory offers.
+You can retrieve all information about a product using the function `InAppPurchase.getProductBy(identifier: "my_product_id")`. This returns an [SKProduct](https://developer.apple.com/documentation/storekit/skproduct) extended with [helpful methods](Extensions/SKProduct.html).
+
+Those are the most important:
+- `productIdentifier: String` - The string that identifies the product to the Apple AppStore.
+- `localizedTitle: String` - The name of the product, in the language of the device, as retrieved from the AppStore.
+- `localizedDescription: String` - A description of the product, in the language of the device, as retrieved from the AppStore.
+- `localizedPrice: String` - The cost of the product in the local currency (_read-only property added by this library, available for OSX >= 10.13.2 and iOS >= 11.2_).
+
+For subscription products, you also have some data about subscription periods and introductory offers. (_read-only property added by this library, available for OSX >= 10.13.2 and iOS >= 11.2_)
 
  - `func hasIntroductoryPriceEligible() -> Bool` - The product has an introductory price the user is eligible to.
  - `localizedSubscriptionPeriod: String?` - The period of the subscription.
diff --git a/Documentation/Usage/Purchasing.md b/Documentation/Usage/Purchasing.md
index aede98d..2e0853c 100644
--- a/Documentation/Usage/Purchasing.md
+++ b/Documentation/Usage/Purchasing.md
@@ -11,7 +11,7 @@ That is why the process looks like so:
 - finalizing transactions when product delivery is complete
 - sending purchase request, for which successful doesn't always mean complete
 
-### Initiating a purchase
+## Initiating a purchase
 To initiate a purchase, use the `InAppPurchase.purchase()` function. It takes the `productIdentifier` and a `callback` function, called when the purchase has been processed.
 
 **Important**: Do not process the purchase here, we'll handle that later!
diff --git a/README.md b/README.md
index 0331846..3a3f173 100644
--- a/README.md
+++ b/README.md
@@ -19,104 +19,78 @@
 # Getting Started
 If you haven't already, I highly recommend your read the *Overview* and *Preparing* section of Apple's [In-App Purchase official documentation](https://developer.apple.com/in-app-purchase).
 
+## Requirements
+* Configure your App and Xcode to support In-App Purchases.
+  * [AppStore Connect Setup](https://help.apple.com/app-store-connect/#/devb57be10e7)
+* Create and configure your [Fovea.Billing](https://billing.fovea.cc/?ref=iap-swift-lib) project account:
+  * Set your bundle ID
+  * The iOS Shared Secret (or shared key) is to be retrieved from [AppStoreConnect](https://appstoreconnect.apple.com/)
+  * The iOS Subscription Status URL (only if you want subscriptions)
+
 ## Installation
 * Select your project in Xcode
 * Go to the section *Swift Package*
 * Click on *(+) Add Package Dependency*
 * Copy the Git URL: *https://github.com/iridescent-dev/iap-swift-lib.git*
-* Click on *Next* > *Next*
+* Click on *Next*
+* In *Rules* select *Version: Up to Next Major ...*
+* Click on *Next*
 * Make sure your project is selected in *Add to target*
 * Click on *Finish*
 
 *Note:* You have to `import InAppPurchaseLib` wherever you use the library.
 
-## Micro Example
-
-```swift
-/** AppDelegate.swift */
-import UIKit
-import InAppPurchaseLib
-
-@UIApplicationMain
-class AppDelegate: UIResponder, UIApplicationDelegate {
-  func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
-    // Initialize the library
-    InAppPurchase.initialize(
-      iapProducts: [
-        IAPProduct(productIdentifier: "my_product", productType: .nonConsumable)
-      ],
-      validatorUrlString: "https://validator.fovea.cc/v1/validate?appName=demo&apiKey=12345678"
-    )
-    return true
-  }
-
-  func applicationWillTerminate(_ application: UIApplication) {
-    // clean
-    InAppPurchase.stop()
-  }
+## Basic Usage
+
+* Initialize the library
+``` swift
+InAppPurchase.initialize(
+  iapProducts: [ IAPProduct(productIdentifier: "my_product", productType: .nonConsumable) ],
+  validatorUrlString: "https://validator.fovea.cc/v1/validate?appName=demo&apiKey=12345678"
+)
+```
+
+* Stop library when the application will terminate
+``` swift
+func applicationWillTerminate(_ application: UIApplication) {
+  InAppPurchase.stop()
 }
 ```
 
-```swift
-/** ViewController.swift */
-import UIKit
-import StoreKit
-import InAppPurchaseLib
-
-class ViewController: UIViewController {
-  private var loaderView = LoaderView()
-  @IBOutlet weak var statusLabel: UILabel!
-  @IBOutlet weak var productTitleLabel: UILabel!
-  @IBOutlet weak var productDescriptionLabel: UILabel!
-  @IBOutlet weak var purchaseButton: UIButton!
-  @IBOutlet weak var restorePurchasesButton: UIButton!
-
-  override func viewDidLoad() {
-    super.viewDidLoad()
-    // Add action for purchases and restore butons.
-    purchaseButton.addTarget(self, action: #selector(self.purchase), for: .touchUpInside)
-    restorePurchasesButton.addTarget(self, action: #selector(self.restorePurchases), for: .touchUpInside)
-  }
-
-  override func viewWillAppear(_ animated: Bool) {
-    self.refreshView()
-    InAppPurchase.refresh(callback: { _ in
-      self.refreshView()
-    })
-  }
-
-  func refreshView() {
-    guard let product: SKProduct = InAppPurchase.getProductBy(identifier: "my_product") else {
-      self.productTitleLabel.text = "Product unavailable"
-      return
-    }
-    // Display product information.
-    productTitleLabel.text = product.localizedTitle
-    productDescriptionLabel.text = product.localizedDescription
-    purchaseButton.setTitle(product.localizedPrice, for: .normal)
-        
-    // Disable the button if the product has already been purchased.
-    if InAppPurchase.hasActivePurchase(for: "my_product") {
-      statusLabel.text = "OWNED"
-      purchaseButton.isPointerInteractionEnabled = false
-    }
-  }
-
-  @IBAction func purchase(_ sender: Any) {
-    self.loaderView.show()
-    InAppPurchase.purchase(
-      productIdentifier: "my_product",
-      callback: { result in
-        self.loaderView.hide()
-      })
-  }
-
-  @IBAction func restorePurchases(_ sender: Any) {
-    self.loaderView.show()
-    InAppPurchase.restorePurchases(callback: { result in
+* Display product information
+``` swift
+guard let product: SKProduct = InAppPurchase.getProductBy(identifier: "my_product") else { return }
+productTitleLabel.text = product.localizedTitle
+productDescriptionLabel.text = product.localizedDescription
+productPriceLabel.text = product.localizedPrice
+```
+
+* Initialize a purchase
+``` swift
+@IBAction func purchase(_ sender: Any) {
+  self.loaderView.show()
+  InAppPurchase.purchase(
+    productIdentifier: "my_product",
+    callback: { result in
       self.loaderView.hide()
     })
-  }
+}
+```
+
+* Unlock purchased content
+``` swift
+if InAppPurchase.hasActivePurchase(for: "my_product") {
+  // display content related to the product
+}
+```
+
+* Restore purchases
+``` swift
+@IBAction func restorePurchases(_ sender: Any) {
+  self.loaderView.show()
+  InAppPurchase.restorePurchases(callback: { result in
+    self.loaderView.hide()
+  })
 }
 ```
 
diff --git a/Sources/InAppPurchaseLib/Common/IAPCallback.swift b/Sources/InAppPurchaseLib/Common/IAPCallback.swift
index 0e3309b..4b20011 100644
--- a/Sources/InAppPurchaseLib/Common/IAPCallback.swift
+++ b/Sources/InAppPurchaseLib/Common/IAPCallback.swift
@@ -13,10 +13,19 @@ public typealias IAPPurchaseCallback = (IAPPurchaseResult) -> Void
 
 /// The result returned in the `purchase()` callback.
 public struct IAPPurchaseResult {
+    /// The result state.
     public internal(set) var state: IAPPurchaseResultState
+    
+    /// If the state is `failed`, the result can return an `IAPError`.
+    /// The error occurred during the processing of the purchase by the library.
     public internal(set) var iapError: IAPError? = nil
+    
+    /// If the state is `failed`, the result can return an `SKError`.
+    /// The error occurred during the processing of the purchase by the App Store.
     public internal(set) var skError: SKError? = nil
     
+    /// If there is an error, return the localized description.
+    /// - See also: `IAPError` and `SKError`.
     public var localizedDescription: String? {
         if skError != nil { return skError!.localizedDescription }
         if iapError != nil { return iapError!.localizedDescription }
@@ -28,10 +37,13 @@ public struct IAPPurchaseResult {
 public enum IAPPurchaseResultState {
     /// The purchase was successful.
     case purchased
+    
     /// Puchase failed.
     case failed
+    
     /// The purchase was cancelled by the user.
     case cancelled
+    
     /// The purchase is deferred.
     case deferred
 }
@@ -41,9 +53,17 @@ public typealias IAPRefreshCallback = (IAPRefreshResult) -> Void
 
 /// The result returned in the `refresh()` or `restorePurchases()` callback.
 public struct IAPRefreshResult {
+    /// The result state.
     public internal(set) var state: IAPRefreshResultState
+    
+    /// If the state is `failed`, the result can return an `IAPError`.
+    /// The error occurred during the processing of the purchase by the library.
     public internal(set) var iapError: IAPError? = nil
+    
+    /// If the state is `succeeded`, returns the number of purchases that have been added.
     public internal(set) var addedPurchases: Int = 0
+    
+    /// If the state is `succeeded`, returns the number of purchases that have been updated.
     public internal(set) var updatedPurchases: Int = 0
 }
 
@@ -51,8 +71,10 @@ public struct IAPRefreshResult {
 public enum IAPRefreshResultState {
     /// Refresh was successful.
     case succeeded
+    
     /// Refresh failed.
     case failed
+    
     /// Refresh has been skipped because it is not necessary.
     case skipped
 }
diff --git a/Sources/InAppPurchaseLib/InAppPurchase.swift b/Sources/InAppPurchaseLib/InAppPurchase.swift
index caa0efe..5a12f6d 100644
--- a/Sources/InAppPurchaseLib/InAppPurchase.swift
+++ b/Sources/InAppPurchaseLib/InAppPurchase.swift
@@ -8,17 +8,17 @@
 import Foundation
 import StoreKit
 
-/// 
+/// The main class of the library.
 public class InAppPurchase: NSObject, InAppPurchaseLib {
-    // InAppPurchaseLib version number.
+    /// InAppPurchaseLib version number.
     internal static let versionNumber = "1.0.2"
-    // The initialize function has been called.
+    /// The initialize function has been called.
     internal static var initialized: Bool {
         return !iapProducts.isEmpty && iapPurchaseDelegate != nil && validatorUrlString != nil
     }
-    // Callbacks that are waiting for the refresh.
+    /// Callbacks that are waiting for the refresh.
     private static var refreshCallbacks: Array<IAPRefreshCallback> = []
-    // The date of the last refresh.
+    /// The date of the last refresh.
     private static var lastRefreshDate: Date? = nil
     
     
diff --git a/Sources/InAppPurchaseLib/InAppPurchaseLib.swift b/Sources/InAppPurchaseLib/InAppPurchaseLib.swift
index f1bdbf2..d898c40 100644
--- a/Sources/InAppPurchaseLib/InAppPurchaseLib.swift
+++ b/Sources/InAppPurchaseLib/InAppPurchaseLib.swift
@@ -25,7 +25,7 @@ public protocol InAppPurchaseLib {
     ///     - iapProducts: An array of `IAPProduct`.
     ///     - validatorUrlString: The validator url retrieved from Fovea.
     ///     - iapPurchaseDelegate: An instance of class that adopts the `IAPPurchaseDelegate` protocol (default value = `DefaultPurchaseDelegate`).
-    ///     - applicationUsername: The user name, if your app implements user login.
+    ///     - applicationUsername: The user name, if your app implements user login (default value = `nil`).
     static func initialize(iapProducts: Array<IAPProduct>, validatorUrlString: String, iapPurchaseDelegate: IAPPurchaseDelegate, applicationUsername: String?) -> Void
     
     /// Stop observing the payment queue, when the application will terminate, for proper cleanup.
@@ -58,7 +58,7 @@ public protocol InAppPurchaseLib {
     /// Request a Payment from the App Store.
     /// - Parameters:
     ///     - productIdentifier: The identifier of the product to purchase.
-    ///     - quantity: The quantity to purchase (default value = 1).
+    ///     - quantity: The quantity to purchase (default value = `1`).
     ///     - callback: The function that will be called after processing.
     /// - See also:`IAPPurchaseResult`
     static func purchase(productIdentifier: String, quantity: Int, callback: @escaping IAPPurchaseCallback) -> Void
@@ -104,12 +104,12 @@ public protocol InAppPurchaseLib {
 }
 
 public extension InAppPurchaseLib {
-    // Sets default `iapPurchaseDelegate` and `applicationUsername`
+    /// Sets `DefaultPurchaseDelegate` as default value for `iapPurchaseDelegate` and `nil` for `applicationUsername`.
     static func initialize(iapProducts: Array<IAPProduct>, validatorUrlString: String, iapPurchaseDelegate: IAPPurchaseDelegate = DefaultPurchaseDelegate(), applicationUsername: String? = nil) {
         return initialize(iapProducts: iapProducts, validatorUrlString: validatorUrlString, iapPurchaseDelegate: iapPurchaseDelegate, applicationUsername: applicationUsername)
     }
     
-    // Sets 1 as default value for the quantity.
+    /// Sets `1` as default value for the `quantity`.
     static func purchase(productIdentifier: String, quantity: Int = 1, callback: @escaping IAPPurchaseCallback) {
         return purchase(productIdentifier: productIdentifier, quantity: quantity, callback: callback)
     }
@@ -132,7 +132,7 @@ public class DefaultPurchaseDelegate: IAPPurchaseDelegate {
     
     /// Finish the product transactions when a product is newly purchased, updated or restored.
     /// - Parameter productIdentifier: The identifier of the product.
-    public func productPurchased(productIdentifier: String) {
+    public func productPurchased(productIdentifier: String) -> Void {
         InAppPurchase.finishTransactions(for: productIdentifier)
     }
 }
diff --git a/Sources/InAppPurchaseLib/Product/IAPProduct.swift b/Sources/InAppPurchaseLib/Product/IAPProduct.swift
index 115a87e..d6cbc81 100644
--- a/Sources/InAppPurchaseLib/Product/IAPProduct.swift
+++ b/Sources/InAppPurchaseLib/Product/IAPProduct.swift
@@ -7,6 +7,7 @@
 
 import Foundation
 
+/// Basic product information used by `InAppPurchase`.
 public struct IAPProduct {
     
     /// The identifier of the product.
@@ -27,9 +28,14 @@ public struct IAPProduct {
     }
 }
 
+/// Types of in-app purchases.
 public enum IAPProductType {
+    /// Consumable in-app purchases are used once, are depleted, and can be purchased again.
     case consumable
+    /// Non-consumables are purchased once and do not expire.
     case nonConsumable
+    /// This type of subscription does not renew automatically, so users need to renew each time.
     case nonRenewingSubscription
+    /// Users are charged on a recurring basis until they decide to cancel.
     case autoRenewableSubscription
 }
diff --git a/Sources/InAppPurchaseLib/Product/SKProductExtension.swift b/Sources/InAppPurchaseLib/Product/SKProductExtension.swift
index d8c61d2..e51eeb4 100644
--- a/Sources/InAppPurchaseLib/Product/SKProductExtension.swift
+++ b/Sources/InAppPurchaseLib/Product/SKProductExtension.swift
@@ -8,15 +8,21 @@
 import Foundation
 import StoreKit
 
-
+/// The format used for the localized subscription periods.
 public enum IAPPeriodFormat {
+    /// Remove the number of units if it is equal to 1.
+    /// Ex: if the period is "1 month", the returned period will be "month".
     case short
+    
+    /// The period will be returned with the number and the unit.
+    /// Ex: "1 month".
     case long
 }
 
 @available(OSX 10.13.2, *)
 @available(iOS 11.2, *)
 extension SKProduct {
+    /// The format used for the localized subscription periods.
     public static var localizedPeriodFormat: IAPPeriodFormat = .short
     
     /// Checks if the product has an introductory price the user is eligible to.
diff --git a/docs/API documentation.html b/docs/API documentation.html
index 70cd86c..09bdafa 100644
--- a/docs/API documentation.html	
+++ b/docs/API documentation.html	
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -205,7 +205,8 @@ <h1 id='errors' class='heading'>Errors</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        
+                        <p>The main class of the library.</p>
+
                         <a href="Classes/InAppPurchase.html" class="slightly-smaller">See more</a>
                       </div>
                       <div class="declaration">
@@ -316,7 +317,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Basic product information used by <code><a href="Classes/InAppPurchase.html">InAppPurchase</a></code>.</p>
 
                         <a href="Structs/IAPProduct.html" class="slightly-smaller">See more</a>
                       </div>
@@ -344,7 +345,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Types of in-app purchases.</p>
 
                         <a href="Enums/IAPProductType.html" class="slightly-smaller">See more</a>
                       </div>
@@ -399,7 +400,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The format used for the localized subscription periods.</p>
 
                         <a href="Enums/IAPPeriodFormat.html" class="slightly-smaller">See more</a>
                       </div>
diff --git a/docs/Classes/DefaultPurchaseDelegate.html b/docs/Classes/DefaultPurchaseDelegate.html
index 5e4025c..838137f 100644
--- a/docs/Classes/DefaultPurchaseDelegate.html
+++ b/docs/Classes/DefaultPurchaseDelegate.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Classes/InAppPurchase.html b/docs/Classes/InAppPurchase.html
index 269267c..306e5e0 100644
--- a/docs/Classes/InAppPurchase.html
+++ b/docs/Classes/InAppPurchase.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,8 @@ <h1>InAppPurchase</h1>
 
                 </div>
               </div>
-            
+            <p>The main class of the library.</p>
+
           </div>
         </section>
 
diff --git a/docs/Enums/IAPErrorCode.html b/docs/Enums/IAPErrorCode.html
index 16f2456..0e6d852 100644
--- a/docs/Enums/IAPErrorCode.html
+++ b/docs/Enums/IAPErrorCode.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Enums/IAPPeriodFormat.html b/docs/Enums/IAPPeriodFormat.html
index d2e9a5f..becff06 100644
--- a/docs/Enums/IAPPeriodFormat.html
+++ b/docs/Enums/IAPPeriodFormat.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPPeriodFormat</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>The format used for the localized subscription periods.</p>
 
           </div>
         </section>
@@ -190,7 +190,8 @@ <h1>IAPPeriodFormat</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Remove the number of units if it is equal to 1.
+Ex: if the period is &ldquo;1 month&rdquo;, the returned period will be &ldquo;month&rdquo;.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +218,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The period will be returned with the number and the unit.
+Ex: &ldquo;1 month&rdquo;.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/Enums/IAPProductType.html b/docs/Enums/IAPProductType.html
index 645973d..4cf7513 100644
--- a/docs/Enums/IAPProductType.html
+++ b/docs/Enums/IAPProductType.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPProductType</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>Types of in-app purchases.</p>
 
           </div>
         </section>
@@ -190,7 +190,7 @@ <h1>IAPProductType</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Consumable in-app purchases are used once, are depleted, and can be purchased again.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Non-consumables are purchased once and do not expire.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +244,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>This type of subscription does not renew automatically, so users need to renew each time.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +271,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Users are charged on a recurring basis until they decide to cancel.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/Enums/IAPPurchaseResultState.html b/docs/Enums/IAPPurchaseResultState.html
index 42485c4..5c8ea0a 100644
--- a/docs/Enums/IAPPurchaseResultState.html
+++ b/docs/Enums/IAPPurchaseResultState.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Enums/IAPRefreshResultState.html b/docs/Enums/IAPRefreshResultState.html
index f9151e4..7442d49 100644
--- a/docs/Enums/IAPRefreshResultState.html
+++ b/docs/Enums/IAPRefreshResultState.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Extensions/SKProduct.html b/docs/Extensions/SKProduct.html
index 8fbe59d..4290456 100644
--- a/docs/Extensions/SKProduct.html
+++ b/docs/Extensions/SKProduct.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -189,7 +189,7 @@ <h1>SKProduct</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The format used for the localized subscription periods.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/Getting Started.html b/docs/Getting Started.html
index 717182d..514b505 100644
--- a/docs/Getting Started.html	
+++ b/docs/Getting Started.html	
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,7 +163,7 @@
           <div class="section-content top-matter">
             <h1>Getting Started</h1>
             <p>If you haven&rsquo;t already, I highly recommend your read the <em>Overview</em> and <em>Preparing</em> section of Apple&rsquo;s <a href="https://developer.apple.com/in-app-purchase">In-App Purchase official documentation</a>.</p>
-<h2 id='requirements' class='heading'>Requirements</h2>
+<h1 id='requirements' class='heading'>Requirements</h1>
 
 <ul>
 <li>Configure your App and Xcode to support In-App Purchases.
diff --git a/docs/Protocols/IAPErrorProtocol.html b/docs/Protocols/IAPErrorProtocol.html
index 8c3d780..1ce1550 100644
--- a/docs/Protocols/IAPErrorProtocol.html
+++ b/docs/Protocols/IAPErrorProtocol.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Protocols/IAPPurchaseDelegate.html b/docs/Protocols/IAPPurchaseDelegate.html
index 34c6641..ee3c1a4 100644
--- a/docs/Protocols/IAPPurchaseDelegate.html
+++ b/docs/Protocols/IAPPurchaseDelegate.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Protocols/InAppPurchaseLib.html b/docs/Protocols/InAppPurchaseLib.html
index cdb81d0..91b2aa6 100644
--- a/docs/Protocols/InAppPurchaseLib.html
+++ b/docs/Protocols/InAppPurchaseLib.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -306,7 +306,8 @@ <h4>Declaration</h4>
                       </div>
                       <h4>Default Implementation</h4>
                       <div class="default_impl abstract">
-                        
+                        <p>Sets <code>DefaultPurchaseDelegate</code> as default value for <code>iapPurchaseDelegate</code> and <code>nil</code> for <code>applicationUsername</code>.</p>
+
                       </div>
                       <div class="declaration">
                         <h4>Declaration</h4>
@@ -364,7 +365,7 @@ <h4>Parameters</h4>
                               </td>
                               <td>
                                 <div>
-                                  <p>The user name, if your app implements user login.</p>
+                                  <p>The user name, if your app implements user login (default value = <code>nil</code>).</p>
                                 </div>
                               </td>
                             </tr>
@@ -626,7 +627,8 @@ <h4>Return Value</h4>
                       </div>
                       <h4>Default Implementation</h4>
                       <div class="default_impl abstract">
-                        
+                        <p>Sets <code>1</code> as default value for the <code>quantity</code>.</p>
+
                       </div>
                       <div class="declaration">
                         <h4>Declaration</h4>
@@ -660,7 +662,7 @@ <h4>Parameters</h4>
                               </td>
                               <td>
                                 <div>
-                                  <p>The quantity to purchase (default value = 1).</p>
+                                  <p>The quantity to purchase (default value = <code>1</code>).</p>
                                 </div>
                               </td>
                             </tr>
diff --git a/docs/Structs/IAPError.html b/docs/Structs/IAPError.html
index 3ce0582..49e575b 100644
--- a/docs/Structs/IAPError.html
+++ b/docs/Structs/IAPError.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/Structs/IAPProduct.html b/docs/Structs/IAPProduct.html
index f52efcb..214e25a 100644
--- a/docs/Structs/IAPProduct.html
+++ b/docs/Structs/IAPProduct.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPProduct</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>Basic product information used by <code><a href="../Classes/InAppPurchase.html">InAppPurchase</a></code>.</p>
 
           </div>
         </section>
diff --git a/docs/Structs/IAPPurchaseResult.html b/docs/Structs/IAPPurchaseResult.html
index d17b2a6..a84c284 100644
--- a/docs/Structs/IAPPurchaseResult.html
+++ b/docs/Structs/IAPPurchaseResult.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -190,7 +190,7 @@ <h1>IAPPurchaseResult</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The result state.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code><a href="../Structs/IAPError.html">IAPError</a></code>.
+The error occurred during the processing of the purchase by the library.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +245,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code>SKError</code>.
+The error occurred during the processing of the purchase by the App Store.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +273,12 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If there is an error, return the localized description.</p>
+<div class="aside aside-see">
+    <p class="aside-title">See</p>
+    See also: <code><a href="../Structs/IAPError.html">IAPError</a></code> and <code>SKError</code>.
+
+</div>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/Structs/IAPRefreshResult.html b/docs/Structs/IAPRefreshResult.html
index 670d0f2..8d51434 100644
--- a/docs/Structs/IAPRefreshResult.html
+++ b/docs/Structs/IAPRefreshResult.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -190,7 +190,7 @@ <h1>IAPRefreshResult</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The result state.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code><a href="../Structs/IAPError.html">IAPError</a></code>.
+The error occurred during the processing of the purchase by the library.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +245,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>succeeded</code>, returns the number of purchases that have been added.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +272,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>succeeded</code>, returns the number of purchases that have been updated.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/Usage.html b/docs/Usage.html
index 535a067..832c8f7 100644
--- a/docs/Usage.html
+++ b/docs/Usage.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/analytics.html b/docs/analytics.html
index 697340d..05416c9 100644
--- a/docs/analytics.html
+++ b/docs/analytics.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/badge.svg b/docs/badge.svg
index f6985a8..19d671e 100644
--- a/docs/badge.svg
+++ b/docs/badge.svg
@@ -8,7 +8,7 @@
   </clipPath>
   <g clip-path="url(#a)">
     <path fill="#555" d="M0 0h93v20H0z"/>
-    <path fill="#a4a61d" d="M93 0h35v20H93z"/>
+    <path fill="#4c1" d="M93 0h35v20H93z"/>
     <path fill="url(#b)" d="M0 0h128v20H0z"/>
   </g>
   <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110">
@@ -19,10 +19,10 @@
       documentation
     </text>
     <text x="1095" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="250">
-      77%
+      95%
     </text>
     <text x="1095" y="140" transform="scale(.1)" textLength="250">
-      77%
+      95%
     </text>
   </g>
 </svg>
diff --git a/docs/displaying-products-with-purchases.html b/docs/displaying-products-with-purchases.html
index d77fc40..1cf6105 100644
--- a/docs/displaying-products-with-purchases.html
+++ b/docs/displaying-products-with-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -164,10 +164,10 @@
             <h1 id='displaying-products-with-purchases' class='heading'>Displaying products with purchases</h1>
 
 <p>In your store screen, where you present your products titles and prices with a purchase button, there are some cases to handle that we skipped. Owned products and deferred purchases.</p>
-<h3 id='owned-products' class='heading'>Owned products</h3>
+<h2 id='owned-products' class='heading'>Owned products</h2>
 
-<p>Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to <code>InAppPurchase.hasActivePurchase()</code> to and to the example later in this section.</p>
-<h3 id='deferred-purchases' class='heading'>Deferred purchases</h3>
+<p>Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to <code>InAppPurchase.hasActivePurchase()</code> to the example later in this section.</p>
+<h2 id='deferred-purchases' class='heading'>Deferred purchases</h2>
 
 <p>Apple&rsquo;s <strong>Ask to Buy</strong> feature lets parents approve any purchases initiated by children, including in-app purchases.</p>
 
@@ -187,7 +187,7 @@ <h3 id='deferred-purchases' class='heading'>Deferred purchases</h3>
 <p>We will use the <code>hasDeferredTransaction</code> method:</p>
 <pre class="highlight swift"><code><span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasDeferredTransaction</span><span class="p">(</span><span class="k">for</span> <span class="nv">productIdentifier</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span>
 </code></pre>
-<h3 id='example' class='heading'>Example</h3>
+<h2 id='example' class='heading'>Example</h2>
 
 <p>Here&rsquo;s an example that covers what has been discussed above. We will update our example <code>refreshView</code> function from before:</p>
 <pre class="highlight swift"><code><span class="kd">@objc</span> <span class="kd">func</span> <span class="nf">refreshView</span><span class="p">()</span> <span class="p">{</span>
diff --git a/docs/displaying-products.html b/docs/displaying-products.html
index cc50b1f..9413128 100644
--- a/docs/displaying-products.html
+++ b/docs/displaying-products.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -165,7 +165,7 @@ <h1 id='displaying-products' class='heading'>Displaying products</h1>
 
 <p>Let&rsquo;s start with the simplest case: you have a single product.</p>
 
-<p>You can retrieve all information about this product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with helpful methods.</p>
+<p>You can retrieve all information about this product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with <a href="Extensions/SKProduct.html">helpful methods</a>.</p>
 
 <p>Those are the most important:</p>
 
@@ -173,7 +173,7 @@ <h1 id='displaying-products' class='heading'>Displaying products</h1>
 <li><code>productIdentifier: String</code> - The string that identifies the product to the Apple AppStore.</li>
 <li><code>localizedTitle: String</code> - The name of the product, in the language of the device, as retrieved from the AppStore.</li>
 <li><code>localizedDescription: String</code> - A description of the product, in the language of the device, as retrieved from the AppStore.</li>
-<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library</em>).</li>
+<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>).</li>
 </ul>
 
 <p><em>Example</em>:</p>
diff --git a/docs/displaying-subscriptions.html b/docs/displaying-subscriptions.html
index 640c8ff..6d7bbdf 100644
--- a/docs/displaying-subscriptions.html
+++ b/docs/displaying-subscriptions.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,7 +163,18 @@
             
             <h1 id='displaying-subscriptions' class='heading'>Displaying subscriptions</h1>
 
-<p>For subscription products, you also have some data about subscription periods and introductory offers.</p>
+<p>You can retrieve all information about a product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with <a href="Extensions/SKProduct.html">helpful methods</a>.</p>
+
+<p>Those are the most important:</p>
+
+<ul>
+<li><code>productIdentifier: String</code> - The string that identifies the product to the Apple AppStore.</li>
+<li><code>localizedTitle: String</code> - The name of the product, in the language of the device, as retrieved from the AppStore.</li>
+<li><code>localizedDescription: String</code> - A description of the product, in the language of the device, as retrieved from the AppStore.</li>
+<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>).</li>
+</ul>
+
+<p>For subscription products, you also have some data about subscription periods and introductory offers. (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>)</p>
 
 <ul>
 <li><code>func hasIntroductoryPriceEligible() -&gt; Bool</code> - The product has an introductory price the user is eligible to.</li>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/API documentation.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/API documentation.html
index 70cd86c..09bdafa 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/API documentation.html	
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/API documentation.html	
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -205,7 +205,8 @@ <h1 id='errors' class='heading'>Errors</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        
+                        <p>The main class of the library.</p>
+
                         <a href="Classes/InAppPurchase.html" class="slightly-smaller">See more</a>
                       </div>
                       <div class="declaration">
@@ -316,7 +317,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Basic product information used by <code><a href="Classes/InAppPurchase.html">InAppPurchase</a></code>.</p>
 
                         <a href="Structs/IAPProduct.html" class="slightly-smaller">See more</a>
                       </div>
@@ -344,7 +345,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Types of in-app purchases.</p>
 
                         <a href="Enums/IAPProductType.html" class="slightly-smaller">See more</a>
                       </div>
@@ -399,7 +400,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The format used for the localized subscription periods.</p>
 
                         <a href="Enums/IAPPeriodFormat.html" class="slightly-smaller">See more</a>
                       </div>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/DefaultPurchaseDelegate.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/DefaultPurchaseDelegate.html
index 5e4025c..838137f 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/DefaultPurchaseDelegate.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/DefaultPurchaseDelegate.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/InAppPurchase.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/InAppPurchase.html
index 269267c..306e5e0 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/InAppPurchase.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Classes/InAppPurchase.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,8 @@ <h1>InAppPurchase</h1>
 
                 </div>
               </div>
-            
+            <p>The main class of the library.</p>
+
           </div>
         </section>
 
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPErrorCode.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPErrorCode.html
index 16f2456..0e6d852 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPErrorCode.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPErrorCode.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPeriodFormat.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPeriodFormat.html
index d2e9a5f..becff06 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPeriodFormat.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPeriodFormat.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPPeriodFormat</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>The format used for the localized subscription periods.</p>
 
           </div>
         </section>
@@ -190,7 +190,8 @@ <h1>IAPPeriodFormat</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Remove the number of units if it is equal to 1.
+Ex: if the period is &ldquo;1 month&rdquo;, the returned period will be &ldquo;month&rdquo;.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +218,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The period will be returned with the number and the unit.
+Ex: &ldquo;1 month&rdquo;.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPProductType.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPProductType.html
index 645973d..4cf7513 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPProductType.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPProductType.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPProductType</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>Types of in-app purchases.</p>
 
           </div>
         </section>
@@ -190,7 +190,7 @@ <h1>IAPProductType</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Consumable in-app purchases are used once, are depleted, and can be purchased again.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Non-consumables are purchased once and do not expire.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +244,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>This type of subscription does not renew automatically, so users need to renew each time.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +271,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>Users are charged on a recurring basis until they decide to cancel.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPurchaseResultState.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPurchaseResultState.html
index 42485c4..5c8ea0a 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPurchaseResultState.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPPurchaseResultState.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPRefreshResultState.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPRefreshResultState.html
index f9151e4..7442d49 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPRefreshResultState.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Enums/IAPRefreshResultState.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Extensions/SKProduct.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Extensions/SKProduct.html
index 8fbe59d..4290456 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Extensions/SKProduct.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Extensions/SKProduct.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -189,7 +189,7 @@ <h1>SKProduct</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The format used for the localized subscription periods.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Getting Started.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Getting Started.html
index 717182d..514b505 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Getting Started.html	
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Getting Started.html	
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,7 +163,7 @@
           <div class="section-content top-matter">
             <h1>Getting Started</h1>
             <p>If you haven&rsquo;t already, I highly recommend your read the <em>Overview</em> and <em>Preparing</em> section of Apple&rsquo;s <a href="https://developer.apple.com/in-app-purchase">In-App Purchase official documentation</a>.</p>
-<h2 id='requirements' class='heading'>Requirements</h2>
+<h1 id='requirements' class='heading'>Requirements</h1>
 
 <ul>
 <li>Configure your App and Xcode to support In-App Purchases.
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPErrorProtocol.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPErrorProtocol.html
index 8c3d780..1ce1550 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPErrorProtocol.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPErrorProtocol.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPPurchaseDelegate.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPPurchaseDelegate.html
index 34c6641..ee3c1a4 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPPurchaseDelegate.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/IAPPurchaseDelegate.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/InAppPurchaseLib.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/InAppPurchaseLib.html
index cdb81d0..91b2aa6 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/InAppPurchaseLib.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Protocols/InAppPurchaseLib.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -306,7 +306,8 @@ <h4>Declaration</h4>
                       </div>
                       <h4>Default Implementation</h4>
                       <div class="default_impl abstract">
-                        
+                        <p>Sets <code>DefaultPurchaseDelegate</code> as default value for <code>iapPurchaseDelegate</code> and <code>nil</code> for <code>applicationUsername</code>.</p>
+
                       </div>
                       <div class="declaration">
                         <h4>Declaration</h4>
@@ -364,7 +365,7 @@ <h4>Parameters</h4>
                               </td>
                               <td>
                                 <div>
-                                  <p>The user name, if your app implements user login.</p>
+                                  <p>The user name, if your app implements user login (default value = <code>nil</code>).</p>
                                 </div>
                               </td>
                             </tr>
@@ -626,7 +627,8 @@ <h4>Return Value</h4>
                       </div>
                       <h4>Default Implementation</h4>
                       <div class="default_impl abstract">
-                        
+                        <p>Sets <code>1</code> as default value for the <code>quantity</code>.</p>
+
                       </div>
                       <div class="declaration">
                         <h4>Declaration</h4>
@@ -660,7 +662,7 @@ <h4>Parameters</h4>
                               </td>
                               <td>
                                 <div>
-                                  <p>The quantity to purchase (default value = 1).</p>
+                                  <p>The quantity to purchase (default value = <code>1</code>).</p>
                                 </div>
                               </td>
                             </tr>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPError.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPError.html
index 3ce0582..49e575b 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPError.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPError.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPProduct.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPProduct.html
index f52efcb..214e25a 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPProduct.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPProduct.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -168,7 +168,7 @@ <h1>IAPProduct</h1>
 
                 </div>
               </div>
-            <p>Undocumented</p>
+            <p>Basic product information used by <code><a href="../Classes/InAppPurchase.html">InAppPurchase</a></code>.</p>
 
           </div>
         </section>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPPurchaseResult.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPPurchaseResult.html
index d17b2a6..a84c284 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPPurchaseResult.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPPurchaseResult.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -190,7 +190,7 @@ <h1>IAPPurchaseResult</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The result state.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code><a href="../Structs/IAPError.html">IAPError</a></code>.
+The error occurred during the processing of the purchase by the library.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +245,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code>SKError</code>.
+The error occurred during the processing of the purchase by the App Store.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +273,12 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If there is an error, return the localized description.</p>
+<div class="aside aside-see">
+    <p class="aside-title">See</p>
+    See also: <code><a href="../Structs/IAPError.html">IAPError</a></code> and <code>SKError</code>.
+
+</div>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPRefreshResult.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPRefreshResult.html
index 670d0f2..8d51434 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPRefreshResult.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Structs/IAPRefreshResult.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="../index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -190,7 +190,7 @@ <h1>IAPRefreshResult</h1>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>The result state.</p>
 
                       </div>
                       <div class="declaration">
@@ -217,7 +217,8 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>failed</code>, the result can return an <code><a href="../Structs/IAPError.html">IAPError</a></code>.
+The error occurred during the processing of the purchase by the library.</p>
 
                       </div>
                       <div class="declaration">
@@ -244,7 +245,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>succeeded</code>, returns the number of purchases that have been added.</p>
 
                       </div>
                       <div class="declaration">
@@ -271,7 +272,7 @@ <h4>Declaration</h4>
                     <section class="section">
                       <div class="pointer"></div>
                       <div class="abstract">
-                        <p>Undocumented</p>
+                        <p>If the state is <code>succeeded</code>, returns the number of purchases that have been updated.</p>
 
                       </div>
                       <div class="declaration">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Usage.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Usage.html
index 535a067..832c8f7 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Usage.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/Usage.html
@@ -23,7 +23,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/analytics.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/analytics.html
index 697340d..05416c9 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/analytics.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/analytics.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/badge.svg b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/badge.svg
index f6985a8..19d671e 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/badge.svg
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/badge.svg
@@ -8,7 +8,7 @@
   </clipPath>
   <g clip-path="url(#a)">
     <path fill="#555" d="M0 0h93v20H0z"/>
-    <path fill="#a4a61d" d="M93 0h35v20H93z"/>
+    <path fill="#4c1" d="M93 0h35v20H93z"/>
     <path fill="url(#b)" d="M0 0h128v20H0z"/>
   </g>
   <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="110">
@@ -19,10 +19,10 @@
       documentation
     </text>
     <text x="1095" y="150" fill="#010101" fill-opacity=".3" transform="scale(.1)" textLength="250">
-      77%
+      95%
     </text>
     <text x="1095" y="140" transform="scale(.1)" textLength="250">
-      77%
+      95%
     </text>
   </g>
 </svg>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products-with-purchases.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products-with-purchases.html
index d77fc40..1cf6105 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products-with-purchases.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products-with-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -164,10 +164,10 @@
             <h1 id='displaying-products-with-purchases' class='heading'>Displaying products with purchases</h1>
 
 <p>In your store screen, where you present your products titles and prices with a purchase button, there are some cases to handle that we skipped. Owned products and deferred purchases.</p>
-<h3 id='owned-products' class='heading'>Owned products</h3>
+<h2 id='owned-products' class='heading'>Owned products</h2>
 
-<p>Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to <code>InAppPurchase.hasActivePurchase()</code> to and to the example later in this section.</p>
-<h3 id='deferred-purchases' class='heading'>Deferred purchases</h3>
+<p>Non-consumables and active auto-renewing subscriptions cannot be purchased again. You should adjust your UI to reflect that state. Refer to <code>InAppPurchase.hasActivePurchase()</code> to the example later in this section.</p>
+<h2 id='deferred-purchases' class='heading'>Deferred purchases</h2>
 
 <p>Apple&rsquo;s <strong>Ask to Buy</strong> feature lets parents approve any purchases initiated by children, including in-app purchases.</p>
 
@@ -187,7 +187,7 @@ <h3 id='deferred-purchases' class='heading'>Deferred purchases</h3>
 <p>We will use the <code>hasDeferredTransaction</code> method:</p>
 <pre class="highlight swift"><code><span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasDeferredTransaction</span><span class="p">(</span><span class="k">for</span> <span class="nv">productIdentifier</span><span class="p">:</span> <span class="kt">String</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span>
 </code></pre>
-<h3 id='example' class='heading'>Example</h3>
+<h2 id='example' class='heading'>Example</h2>
 
 <p>Here&rsquo;s an example that covers what has been discussed above. We will update our example <code>refreshView</code> function from before:</p>
 <pre class="highlight swift"><code><span class="kd">@objc</span> <span class="kd">func</span> <span class="nf">refreshView</span><span class="p">()</span> <span class="p">{</span>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products.html
index cc50b1f..9413128 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-products.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -165,7 +165,7 @@ <h1 id='displaying-products' class='heading'>Displaying products</h1>
 
 <p>Let&rsquo;s start with the simplest case: you have a single product.</p>
 
-<p>You can retrieve all information about this product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with helpful methods.</p>
+<p>You can retrieve all information about this product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with <a href="Extensions/SKProduct.html">helpful methods</a>.</p>
 
 <p>Those are the most important:</p>
 
@@ -173,7 +173,7 @@ <h1 id='displaying-products' class='heading'>Displaying products</h1>
 <li><code>productIdentifier: String</code> - The string that identifies the product to the Apple AppStore.</li>
 <li><code>localizedTitle: String</code> - The name of the product, in the language of the device, as retrieved from the AppStore.</li>
 <li><code>localizedDescription: String</code> - A description of the product, in the language of the device, as retrieved from the AppStore.</li>
-<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library</em>).</li>
+<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>).</li>
 </ul>
 
 <p><em>Example</em>:</p>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-subscriptions.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-subscriptions.html
index 640c8ff..6d7bbdf 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-subscriptions.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/displaying-subscriptions.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,7 +163,18 @@
             
             <h1 id='displaying-subscriptions' class='heading'>Displaying subscriptions</h1>
 
-<p>For subscription products, you also have some data about subscription periods and introductory offers.</p>
+<p>You can retrieve all information about a product using the function <code>InAppPurchase.getProductBy(identifier: &quot;my_product_id&quot;)</code>. This returns an <a href="https://developer.apple.com/documentation/storekit/skproduct">SKProduct</a> extended with <a href="Extensions/SKProduct.html">helpful methods</a>.</p>
+
+<p>Those are the most important:</p>
+
+<ul>
+<li><code>productIdentifier: String</code> - The string that identifies the product to the Apple AppStore.</li>
+<li><code>localizedTitle: String</code> - The name of the product, in the language of the device, as retrieved from the AppStore.</li>
+<li><code>localizedDescription: String</code> - A description of the product, in the language of the device, as retrieved from the AppStore.</li>
+<li><code>localizedPrice: String</code> - The cost of the product in the local currency (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>).</li>
+</ul>
+
+<p>For subscription products, you also have some data about subscription periods and introductory offers. (<em>read-only property added by this library, available for OSX &gt;= 10.13.2 and iOS &gt;= 11.2</em>)</p>
 
 <ul>
 <li><code>func hasIntroductoryPriceEligible() -&gt; Bool</code> - The product has an introductory price the user is eligible to.</li>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/errors.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/errors.html
index 33fa397..c33344b 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/errors.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/errors.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/handling-purchases.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/handling-purchases.html
index 00379e9..78695da 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/handling-purchases.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/handling-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/img/ScreenshotInstallation2.png b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/img/ScreenshotInstallation2.png
new file mode 100644
index 0000000..88a3ee3
Binary files /dev/null and b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/img/ScreenshotInstallation2.png differ
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/index.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/index.html
index a697913..75e6a04 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/index.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/index.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -183,6 +183,22 @@ <h1 id='features' class='heading'>Features</h1>
 <h1 id='getting-started' class='heading'>Getting Started</h1>
 
 <p>If you haven&rsquo;t already, I highly recommend your read the <em>Overview</em> and <em>Preparing</em> section of Apple&rsquo;s <a href="https://developer.apple.com/in-app-purchase">In-App Purchase official documentation</a>.</p>
+<h2 id='requirements' class='heading'>Requirements</h2>
+
+<ul>
+<li>Configure your App and Xcode to support In-App Purchases.
+
+<ul>
+<li><a href="https://help.apple.com/app-store-connect/#/devb57be10e7">AppStore Connect Setup</a></li>
+</ul></li>
+<li>Create and configure your <a href="https://billing.fovea.cc/?ref=iap-swift-lib">Fovea.Billing</a> project account:
+
+<ul>
+<li>Set your bundle ID</li>
+<li>The iOS Shared Secret (or shared key) is to be retrieved from <a href="https://appstoreconnect.apple.com/">AppStoreConnect</a></li>
+<li>The iOS Subscription Status URL (only if you want subscriptions)</li>
+</ul></li>
+</ul>
 <h2 id='installation' class='heading'>Installation</h2>
 
 <ul>
@@ -190,97 +206,58 @@ <h2 id='installation' class='heading'>Installation</h2>
 <li>Go to the section <em>Swift Package</em></li>
 <li>Click on <em>(+) Add Package Dependency</em></li>
 <li>Copy the Git URL: <em><a href="https://github.com/iridescent-dev/iap-swift-lib.git">https://github.com/iridescent-dev/iap-swift-lib.git</a></em></li>
-<li>Click on <em>Next</em> &gt; <em>Next</em></li>
+<li>Click on <em>Next</em></li>
+<li>In <em>Rules</em> select <em>Version: Up to Next Major &hellip;</em></li>
+<li>Click on <em>Next</em></li>
 <li>Make sure your project is selected in <em>Add to target</em></li>
 <li>Click on <em>Finish</em></li>
 </ul>
 
 <p><em>Note:</em> You have to <code>import InAppPurchaseLib</code> wherever you use the library.</p>
-<h2 id='micro-example' class='heading'>Micro Example</h2>
-<pre class="highlight swift"><code><span class="cm">/** AppDelegate.swift */</span>
-<span class="kd">import</span> <span class="kt">UIKit</span>
-<span class="kd">import</span> <span class="kt">InAppPurchaseLib</span>
-
-<span class="kd">@UIApplicationMain</span>
-<span class="kd">class</span> <span class="kt">AppDelegate</span><span class="p">:</span> <span class="kt">UIResponder</span><span class="p">,</span> <span class="kt">UIApplicationDelegate</span> <span class="p">{</span>
-  <span class="kd">func</span> <span class="nf">application</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">,</span> <span class="n">didFinishLaunchingWithOptions</span> <span class="nv">launchOptions</span><span class="p">:</span> <span class="p">[</span><span class="kt">UIApplication</span><span class="o">.</span><span class="kt">LaunchOptionsKey</span><span class="p">:</span> <span class="kt">Any</span><span class="p">]?)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span> <span class="p">{</span>
-    <span class="c1">// Initialize the library</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">initialize</span><span class="p">(</span>
-      <span class="nv">iapProducts</span><span class="p">:</span> <span class="p">[</span>
-        <span class="kt">IAPProduct</span><span class="p">(</span><span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span> <span class="nv">productType</span><span class="p">:</span> <span class="o">.</span><span class="n">nonConsumable</span><span class="p">)</span>
-      <span class="p">],</span>
-      <span class="nv">validatorUrlString</span><span class="p">:</span> <span class="s">"https://validator.fovea.cc/v1/validate?appName=demo&amp;apiKey=12345678"</span>
-    <span class="p">)</span>
-    <span class="k">return</span> <span class="kc">true</span>
-  <span class="p">}</span>
+<h2 id='basic-usage' class='heading'>Basic Usage</h2>
 
-  <span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
-    <span class="c1">// clean</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
-  <span class="p">}</span>
+<ul>
+<li><p>Initialize the library</p>
+<pre class="highlight swift"><code><span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">initialize</span><span class="p">(</span>
+<span class="nv">iapProducts</span><span class="p">:</span> <span class="p">[</span> <span class="kt">IAPProduct</span><span class="p">(</span><span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span> <span class="nv">productType</span><span class="p">:</span> <span class="o">.</span><span class="n">nonConsumable</span><span class="p">)</span> <span class="p">],</span>
+<span class="nv">validatorUrlString</span><span class="p">:</span> <span class="s">"https://validator.fovea.cc/v1/validate?appName=demo&amp;apiKey=12345678"</span>
+<span class="p">)</span>
+</code></pre></li>
+<li><p>Stop library when the application will terminate</p>
+<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
 <span class="p">}</span>
-</code></pre>
-<pre class="highlight swift"><code><span class="cm">/** ViewController.swift */</span>
-<span class="kd">import</span> <span class="kt">UIKit</span>
-<span class="kd">import</span> <span class="kt">StoreKit</span>
-<span class="kd">import</span> <span class="kt">InAppPurchaseLib</span>
-
-<span class="kd">class</span> <span class="kt">ViewController</span><span class="p">:</span> <span class="kt">UIViewController</span> <span class="p">{</span>
-  <span class="kd">private</span> <span class="k">var</span> <span class="nv">loaderView</span> <span class="o">=</span> <span class="kt">LoaderView</span><span class="p">()</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">statusLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">productTitleLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">productDescriptionLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">purchaseButton</span><span class="p">:</span> <span class="kt">UIButton</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">restorePurchasesButton</span><span class="p">:</span> <span class="kt">UIButton</span><span class="o">!</span>
-
-  <span class="k">override</span> <span class="kd">func</span> <span class="nf">viewDidLoad</span><span class="p">()</span> <span class="p">{</span>
-    <span class="k">super</span><span class="o">.</span><span class="nf">viewDidLoad</span><span class="p">()</span>
-    <span class="c1">// Add action for purchases and restore butons.</span>
-    <span class="n">purchaseButton</span><span class="o">.</span><span class="nf">addTarget</span><span class="p">(</span><span class="k">self</span><span class="p">,</span> <span class="nv">action</span><span class="p">:</span> <span class="kd">#selector(</span><span class="nf">self.purchase</span><span class="kd">)</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">touchUpInside</span><span class="p">)</span>
-    <span class="n">restorePurchasesButton</span><span class="o">.</span><span class="nf">addTarget</span><span class="p">(</span><span class="k">self</span><span class="p">,</span> <span class="nv">action</span><span class="p">:</span> <span class="kd">#selector(</span><span class="nf">self.restorePurchases</span><span class="kd">)</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">touchUpInside</span><span class="p">)</span>
-  <span class="p">}</span>
-
-  <span class="k">override</span> <span class="kd">func</span> <span class="nf">viewWillAppear</span><span class="p">(</span><span class="n">_</span> <span class="nv">animated</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="nf">refreshView</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">refresh</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">_</span> <span class="k">in</span>
-      <span class="k">self</span><span class="o">.</span><span class="nf">refreshView</span><span class="p">()</span>
-    <span class="p">})</span>
-  <span class="p">}</span>
-
-  <span class="kd">func</span> <span class="nf">refreshView</span><span class="p">()</span> <span class="p">{</span>
-    <span class="k">guard</span> <span class="k">let</span> <span class="nv">product</span><span class="p">:</span> <span class="kt">SKProduct</span> <span class="o">=</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">getProductBy</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span>
-      <span class="k">self</span><span class="o">.</span><span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="s">"Product unavailable"</span>
-      <span class="k">return</span>
-    <span class="p">}</span>
-    <span class="c1">// Display product information.</span>
-    <span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedTitle</span>
-    <span class="n">productDescriptionLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedDescription</span>
-    <span class="n">purchaseButton</span><span class="o">.</span><span class="nf">setTitle</span><span class="p">(</span><span class="n">product</span><span class="o">.</span><span class="n">localizedPrice</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">normal</span><span class="p">)</span>
-
-    <span class="c1">// Disable the button if the product has already been purchased.</span>
-    <span class="k">if</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasActivePurchase</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="p">{</span>
-      <span class="n">statusLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="s">"OWNED"</span>
-      <span class="n">purchaseButton</span><span class="o">.</span><span class="n">isPointerInteractionEnabled</span> <span class="o">=</span> <span class="kc">false</span>
-    <span class="p">}</span>
-  <span class="p">}</span>
-
-  <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
-      <span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span>
-      <span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
-        <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
-      <span class="p">})</span>
-  <span class="p">}</span>
-
-  <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
-      <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
-    <span class="p">})</span>
-  <span class="p">}</span>
+</code></pre></li>
+<li><p>Display product information</p>
+<pre class="highlight swift"><code><span class="k">guard</span> <span class="k">let</span> <span class="nv">product</span><span class="p">:</span> <span class="kt">SKProduct</span> <span class="o">=</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">getProductBy</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span> <span class="k">return</span> <span class="p">}</span>
+<span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedTitle</span>
+<span class="n">productDescriptionLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedDescription</span>
+<span class="n">productPriceLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedPrice</span>
+</code></pre></li>
+<li><p>Initialize a purchase</p>
+<pre class="highlight swift"><code><span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
+<span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span>
+<span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
+  <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
+<span class="p">})</span>
 <span class="p">}</span>
-</code></pre>
+</code></pre></li>
+<li><p>Unlock purchased content</p>
+<pre class="highlight swift"><code><span class="k">if</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasActivePurchase</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="p">{</span>
+<span class="c1">// display content related to the product</span>
+<span class="p">}</span>
+</code></pre></li>
+<li><p>Restore purchases</p>
+<pre class="highlight swift"><code><span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
+<span class="p">})</span>
+<span class="p">}</span>
+</code></pre></li>
+</ul>
 <h1 id='documentation' class='heading'>Documentation</h1>
 
 <ul>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/initialization.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/initialization.html
index a87c6e0..a9bfef1 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/initialization.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/initialization.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/installation.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/installation.html
index 690922b..6ac8784 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/installation.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/installation.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,22 +163,32 @@
             
             <h1 id='installation' class='heading'>Installation</h1>
 
-<p align="center">
-  <img src="img/ScreenshotInstallation.png" title="Installation">
-</p>
-
 <ul>
 <li>Select your project in Xcode</li>
 <li>Go to the section <em>Swift Package</em></li>
 <li>Click on <em>(+) Add Package Dependency</em></li>
+</ul>
+
+<p align="center">
+  <img src="img/ScreenshotInstallation.png" title="ScreenshotInstallation">
+</p>
+
+<ul>
 <li>Copy the Git URL: <em><a href="https://github.com/iridescent-dev/iap-swift-lib.git">https://github.com/iridescent-dev/iap-swift-lib.git</a></em></li>
-<li>Click on <em>Next</em> &gt; <em>Next</em></li>
+<li>Click on <em>Next</em></li>
+<li>In <em>Rules</em> select <em>Version: Up to Next Major &hellip;</em></li>
+<li>Click on <em>Next</em></li>
+</ul>
+
+<p align="center">
+  <img src="img/ScreenshotInstallation2.png" title="ScreenshotInstallation2">
+</p>
+
+<ul>
 <li>Make sure your project is selected in <em>Add to target</em></li>
 <li>Click on <em>Finish</em></li>
 </ul>
 
-<p><em>Note:</em> You have to <code>import InAppPurchaseLib</code> wherever you use the library.</p>
-
           </div>
         </section>
 
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/micro-example.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/micro-example.html
index 3ae38ac..2b8d48b 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/micro-example.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/micro-example.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -180,7 +180,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
   <span class="p">}</span>
 
   <span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
-    <span class="c1">// Clean</span>
+    <span class="c1">// Stop library when the application will terminate</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
   <span class="p">}</span>
 <span class="p">}</span>
@@ -229,6 +229,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
     <span class="p">}</span>
   <span class="p">}</span>
 
+  <span class="c1">// Initiating a purchase</span>
   <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
     <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
@@ -238,6 +239,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
       <span class="p">})</span>
   <span class="p">}</span>
 
+  <span class="c1">// Restoring purchases</span>
   <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
     <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/purchasing.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/purchasing.html
index 7a6996c..3e7ceb4 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/purchasing.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/purchasing.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -180,7 +180,7 @@ <h1 id='purchasing' class='heading'>Purchasing</h1>
 <li>finalizing transactions when product delivery is complete</li>
 <li>sending purchase request, for which successful doesn&rsquo;t always mean complete</li>
 </ul>
-<h3 id='initiating-a-purchase' class='heading'>Initiating a purchase</h3>
+<h2 id='initiating-a-purchase' class='heading'>Initiating a purchase</h2>
 
 <p>To initiate a purchase, use the <code>InAppPurchase.purchase()</code> function. It takes the <code>productIdentifier</code> and a <code>callback</code> function, called when the purchase has been processed.</p>
 
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/refreshing.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/refreshing.html
index 56e094a..0897f2b 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/refreshing.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/refreshing.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/restoring-purchases.html b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/restoring-purchases.html
index ab44024..b0f5d86 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/restoring-purchases.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/restoring-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/search.json b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/search.json
index ca5875b..cb2b57b 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/search.json
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/search.json
@@ -1 +1 @@
-{"Protocols/IAPErrorProtocol.html#/s:16InAppPurchaseLib16IAPErrorProtocolP4codeAA0E4CodeOvp":{"name":"code","abstract":"<p>Undocumented</p>","parent_name":"IAPErrorProtocol"},"Enums/IAPErrorCode.html#/s:16InAppPurchaseLib12IAPErrorCodeO21libraryNotInitializedyA2CmF":{"name":"libraryNotInitialized","abstract":"<p>You must call the <code>initialize</code> fuction before using the library.</p>","parent_name":"IAPErrorCode"},"Enums/IAPErrorCode.html#/s:16InAppPurchaseLib12IAPErrorCodeO23bundleIdentifierInvalidyA2CmF":{"name":"bundleIdentifierInvalid","abstract":"<p>The Bundle Identifier is invalid.</p>","parent_name":"IAPErrorCode"},"Enums/IAPErrorCode.html#/s:16InAppPurchaseLib12IAPErrorCodeO19validatorUrlInvalidyA2CmF":{"name":"validatorUrlInvalid","abstract":"<p>The Validator URL String is invalid.</p>","parent_name":"IAPErrorCode"},"Enums/IAPErrorCode.html#/s:16InAppPurchaseLib12IAPErrorCodeO20refreshReceiptFailedyA2CmF":{"name":"refreshReceiptFailed","abstract":"<p>Failed to refresh 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\ No newline at end of file
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index ab51e7d..3a3900d 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/server-integration.html
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/server-integration.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/undocumented.json b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/undocumented.json
index f5e8bed..6522d6d 100644
--- a/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/undocumented.json
+++ b/docs/docsets/InAppPurchaseLib.docset/Contents/Resources/Documents/undocumented.json
@@ -9,67 +9,11 @@
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     {
       "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
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-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 40,
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@@ -90,76 +34,6 @@
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diff --git a/docs/docsets/InAppPurchaseLib.tgz b/docs/docsets/InAppPurchaseLib.tgz
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diff --git a/docs/errors.html b/docs/errors.html
index 33fa397..c33344b 100644
--- a/docs/errors.html
+++ b/docs/errors.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/handling-purchases.html b/docs/handling-purchases.html
index 00379e9..78695da 100644
--- a/docs/handling-purchases.html
+++ b/docs/handling-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
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       <p class="header-col--secondary">
diff --git a/docs/img/ScreenshotInstallation2.png b/docs/img/ScreenshotInstallation2.png
new file mode 100644
index 0000000..88a3ee3
Binary files /dev/null and b/docs/img/ScreenshotInstallation2.png differ
diff --git a/docs/index.html b/docs/index.html
index a697913..75e6a04 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
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-         (77% documented)
+         (95% documented)
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       <p class="header-col--secondary">
@@ -183,6 +183,22 @@ <h1 id='features' class='heading'>Features</h1>
 <h1 id='getting-started' class='heading'>Getting Started</h1>
 
 <p>If you haven&rsquo;t already, I highly recommend your read the <em>Overview</em> and <em>Preparing</em> section of Apple&rsquo;s <a href="https://developer.apple.com/in-app-purchase">In-App Purchase official documentation</a>.</p>
+<h2 id='requirements' class='heading'>Requirements</h2>
+
+<ul>
+<li>Configure your App and Xcode to support In-App Purchases.
+
+<ul>
+<li><a href="https://help.apple.com/app-store-connect/#/devb57be10e7">AppStore Connect Setup</a></li>
+</ul></li>
+<li>Create and configure your <a href="https://billing.fovea.cc/?ref=iap-swift-lib">Fovea.Billing</a> project account:
+
+<ul>
+<li>Set your bundle ID</li>
+<li>The iOS Shared Secret (or shared key) is to be retrieved from <a href="https://appstoreconnect.apple.com/">AppStoreConnect</a></li>
+<li>The iOS Subscription Status URL (only if you want subscriptions)</li>
+</ul></li>
+</ul>
 <h2 id='installation' class='heading'>Installation</h2>
 
 <ul>
@@ -190,97 +206,58 @@ <h2 id='installation' class='heading'>Installation</h2>
 <li>Go to the section <em>Swift Package</em></li>
 <li>Click on <em>(+) Add Package Dependency</em></li>
 <li>Copy the Git URL: <em><a href="https://github.com/iridescent-dev/iap-swift-lib.git">https://github.com/iridescent-dev/iap-swift-lib.git</a></em></li>
-<li>Click on <em>Next</em> &gt; <em>Next</em></li>
+<li>Click on <em>Next</em></li>
+<li>In <em>Rules</em> select <em>Version: Up to Next Major &hellip;</em></li>
+<li>Click on <em>Next</em></li>
 <li>Make sure your project is selected in <em>Add to target</em></li>
 <li>Click on <em>Finish</em></li>
 </ul>
 
 <p><em>Note:</em> You have to <code>import InAppPurchaseLib</code> wherever you use the library.</p>
-<h2 id='micro-example' class='heading'>Micro Example</h2>
-<pre class="highlight swift"><code><span class="cm">/** AppDelegate.swift */</span>
-<span class="kd">import</span> <span class="kt">UIKit</span>
-<span class="kd">import</span> <span class="kt">InAppPurchaseLib</span>
-
-<span class="kd">@UIApplicationMain</span>
-<span class="kd">class</span> <span class="kt">AppDelegate</span><span class="p">:</span> <span class="kt">UIResponder</span><span class="p">,</span> <span class="kt">UIApplicationDelegate</span> <span class="p">{</span>
-  <span class="kd">func</span> <span class="nf">application</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">,</span> <span class="n">didFinishLaunchingWithOptions</span> <span class="nv">launchOptions</span><span class="p">:</span> <span class="p">[</span><span class="kt">UIApplication</span><span class="o">.</span><span class="kt">LaunchOptionsKey</span><span class="p">:</span> <span class="kt">Any</span><span class="p">]?)</span> <span class="o">-&gt;</span> <span class="kt">Bool</span> <span class="p">{</span>
-    <span class="c1">// Initialize the library</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">initialize</span><span class="p">(</span>
-      <span class="nv">iapProducts</span><span class="p">:</span> <span class="p">[</span>
-        <span class="kt">IAPProduct</span><span class="p">(</span><span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span> <span class="nv">productType</span><span class="p">:</span> <span class="o">.</span><span class="n">nonConsumable</span><span class="p">)</span>
-      <span class="p">],</span>
-      <span class="nv">validatorUrlString</span><span class="p">:</span> <span class="s">"https://validator.fovea.cc/v1/validate?appName=demo&amp;apiKey=12345678"</span>
-    <span class="p">)</span>
-    <span class="k">return</span> <span class="kc">true</span>
-  <span class="p">}</span>
+<h2 id='basic-usage' class='heading'>Basic Usage</h2>
 
-  <span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
-    <span class="c1">// clean</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
-  <span class="p">}</span>
+<ul>
+<li><p>Initialize the library</p>
+<pre class="highlight swift"><code><span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">initialize</span><span class="p">(</span>
+<span class="nv">iapProducts</span><span class="p">:</span> <span class="p">[</span> <span class="kt">IAPProduct</span><span class="p">(</span><span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span> <span class="nv">productType</span><span class="p">:</span> <span class="o">.</span><span class="n">nonConsumable</span><span class="p">)</span> <span class="p">],</span>
+<span class="nv">validatorUrlString</span><span class="p">:</span> <span class="s">"https://validator.fovea.cc/v1/validate?appName=demo&amp;apiKey=12345678"</span>
+<span class="p">)</span>
+</code></pre></li>
+<li><p>Stop library when the application will terminate</p>
+<pre class="highlight swift"><code><span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
 <span class="p">}</span>
-</code></pre>
-<pre class="highlight swift"><code><span class="cm">/** ViewController.swift */</span>
-<span class="kd">import</span> <span class="kt">UIKit</span>
-<span class="kd">import</span> <span class="kt">StoreKit</span>
-<span class="kd">import</span> <span class="kt">InAppPurchaseLib</span>
-
-<span class="kd">class</span> <span class="kt">ViewController</span><span class="p">:</span> <span class="kt">UIViewController</span> <span class="p">{</span>
-  <span class="kd">private</span> <span class="k">var</span> <span class="nv">loaderView</span> <span class="o">=</span> <span class="kt">LoaderView</span><span class="p">()</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">statusLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">productTitleLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">productDescriptionLabel</span><span class="p">:</span> <span class="kt">UILabel</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">purchaseButton</span><span class="p">:</span> <span class="kt">UIButton</span><span class="o">!</span>
-  <span class="kd">@IBOutlet</span> <span class="k">weak</span> <span class="k">var</span> <span class="nv">restorePurchasesButton</span><span class="p">:</span> <span class="kt">UIButton</span><span class="o">!</span>
-
-  <span class="k">override</span> <span class="kd">func</span> <span class="nf">viewDidLoad</span><span class="p">()</span> <span class="p">{</span>
-    <span class="k">super</span><span class="o">.</span><span class="nf">viewDidLoad</span><span class="p">()</span>
-    <span class="c1">// Add action for purchases and restore butons.</span>
-    <span class="n">purchaseButton</span><span class="o">.</span><span class="nf">addTarget</span><span class="p">(</span><span class="k">self</span><span class="p">,</span> <span class="nv">action</span><span class="p">:</span> <span class="kd">#selector(</span><span class="nf">self.purchase</span><span class="kd">)</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">touchUpInside</span><span class="p">)</span>
-    <span class="n">restorePurchasesButton</span><span class="o">.</span><span class="nf">addTarget</span><span class="p">(</span><span class="k">self</span><span class="p">,</span> <span class="nv">action</span><span class="p">:</span> <span class="kd">#selector(</span><span class="nf">self.restorePurchases</span><span class="kd">)</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">touchUpInside</span><span class="p">)</span>
-  <span class="p">}</span>
-
-  <span class="k">override</span> <span class="kd">func</span> <span class="nf">viewWillAppear</span><span class="p">(</span><span class="n">_</span> <span class="nv">animated</span><span class="p">:</span> <span class="kt">Bool</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="nf">refreshView</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">refresh</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">_</span> <span class="k">in</span>
-      <span class="k">self</span><span class="o">.</span><span class="nf">refreshView</span><span class="p">()</span>
-    <span class="p">})</span>
-  <span class="p">}</span>
-
-  <span class="kd">func</span> <span class="nf">refreshView</span><span class="p">()</span> <span class="p">{</span>
-    <span class="k">guard</span> <span class="k">let</span> <span class="nv">product</span><span class="p">:</span> <span class="kt">SKProduct</span> <span class="o">=</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">getProductBy</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span>
-      <span class="k">self</span><span class="o">.</span><span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="s">"Product unavailable"</span>
-      <span class="k">return</span>
-    <span class="p">}</span>
-    <span class="c1">// Display product information.</span>
-    <span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedTitle</span>
-    <span class="n">productDescriptionLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedDescription</span>
-    <span class="n">purchaseButton</span><span class="o">.</span><span class="nf">setTitle</span><span class="p">(</span><span class="n">product</span><span class="o">.</span><span class="n">localizedPrice</span><span class="p">,</span> <span class="nv">for</span><span class="p">:</span> <span class="o">.</span><span class="n">normal</span><span class="p">)</span>
-
-    <span class="c1">// Disable the button if the product has already been purchased.</span>
-    <span class="k">if</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasActivePurchase</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="p">{</span>
-      <span class="n">statusLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="s">"OWNED"</span>
-      <span class="n">purchaseButton</span><span class="o">.</span><span class="n">isPointerInteractionEnabled</span> <span class="o">=</span> <span class="kc">false</span>
-    <span class="p">}</span>
-  <span class="p">}</span>
-
-  <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
-      <span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span>
-      <span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
-        <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
-      <span class="p">})</span>
-  <span class="p">}</span>
-
-  <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
-    <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
-    <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
-      <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
-    <span class="p">})</span>
-  <span class="p">}</span>
+</code></pre></li>
+<li><p>Display product information</p>
+<pre class="highlight swift"><code><span class="k">guard</span> <span class="k">let</span> <span class="nv">product</span><span class="p">:</span> <span class="kt">SKProduct</span> <span class="o">=</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">getProductBy</span><span class="p">(</span><span class="nv">identifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="k">else</span> <span class="p">{</span> <span class="k">return</span> <span class="p">}</span>
+<span class="n">productTitleLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedTitle</span>
+<span class="n">productDescriptionLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedDescription</span>
+<span class="n">productPriceLabel</span><span class="o">.</span><span class="n">text</span> <span class="o">=</span> <span class="n">product</span><span class="o">.</span><span class="n">localizedPrice</span>
+</code></pre></li>
+<li><p>Initialize a purchase</p>
+<pre class="highlight swift"><code><span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
+<span class="nv">productIdentifier</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">,</span>
+<span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
+  <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
+<span class="p">})</span>
 <span class="p">}</span>
-</code></pre>
+</code></pre></li>
+<li><p>Unlock purchased content</p>
+<pre class="highlight swift"><code><span class="k">if</span> <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">hasActivePurchase</span><span class="p">(</span><span class="nv">for</span><span class="p">:</span> <span class="s">"my_product"</span><span class="p">)</span> <span class="p">{</span>
+<span class="c1">// display content related to the product</span>
+<span class="p">}</span>
+</code></pre></li>
+<li><p>Restore purchases</p>
+<pre class="highlight swift"><code><span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
+<span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
+<span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">hide</span><span class="p">()</span>
+<span class="p">})</span>
+<span class="p">}</span>
+</code></pre></li>
+</ul>
 <h1 id='documentation' class='heading'>Documentation</h1>
 
 <ul>
diff --git a/docs/initialization.html b/docs/initialization.html
index a87c6e0..a9bfef1 100644
--- a/docs/initialization.html
+++ b/docs/initialization.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/installation.html b/docs/installation.html
index 690922b..6ac8784 100644
--- a/docs/installation.html
+++ b/docs/installation.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -163,22 +163,32 @@
             
             <h1 id='installation' class='heading'>Installation</h1>
 
-<p align="center">
-  <img src="img/ScreenshotInstallation.png" title="Installation">
-</p>
-
 <ul>
 <li>Select your project in Xcode</li>
 <li>Go to the section <em>Swift Package</em></li>
 <li>Click on <em>(+) Add Package Dependency</em></li>
+</ul>
+
+<p align="center">
+  <img src="img/ScreenshotInstallation.png" title="ScreenshotInstallation">
+</p>
+
+<ul>
 <li>Copy the Git URL: <em><a href="https://github.com/iridescent-dev/iap-swift-lib.git">https://github.com/iridescent-dev/iap-swift-lib.git</a></em></li>
-<li>Click on <em>Next</em> &gt; <em>Next</em></li>
+<li>Click on <em>Next</em></li>
+<li>In <em>Rules</em> select <em>Version: Up to Next Major &hellip;</em></li>
+<li>Click on <em>Next</em></li>
+</ul>
+
+<p align="center">
+  <img src="img/ScreenshotInstallation2.png" title="ScreenshotInstallation2">
+</p>
+
+<ul>
 <li>Make sure your project is selected in <em>Add to target</em></li>
 <li>Click on <em>Finish</em></li>
 </ul>
 
-<p><em>Note:</em> You have to <code>import InAppPurchaseLib</code> wherever you use the library.</p>
-
           </div>
         </section>
 
diff --git a/docs/micro-example.html b/docs/micro-example.html
index 3ae38ac..2b8d48b 100644
--- a/docs/micro-example.html
+++ b/docs/micro-example.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -180,7 +180,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
   <span class="p">}</span>
 
   <span class="kd">func</span> <span class="nf">applicationWillTerminate</span><span class="p">(</span><span class="n">_</span> <span class="nv">application</span><span class="p">:</span> <span class="kt">UIApplication</span><span class="p">)</span> <span class="p">{</span>
-    <span class="c1">// Clean</span>
+    <span class="c1">// Stop library when the application will terminate</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">stop</span><span class="p">()</span>
   <span class="p">}</span>
 <span class="p">}</span>
@@ -229,6 +229,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
     <span class="p">}</span>
   <span class="p">}</span>
 
+  <span class="c1">// Initiating a purchase</span>
   <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">purchase</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
     <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">purchase</span><span class="p">(</span>
@@ -238,6 +239,7 @@ <h1 id='micro-example' class='heading'>Micro Example</h1>
       <span class="p">})</span>
   <span class="p">}</span>
 
+  <span class="c1">// Restoring purchases</span>
   <span class="kd">@IBAction</span> <span class="kd">func</span> <span class="nf">restorePurchases</span><span class="p">(</span><span class="n">_</span> <span class="nv">sender</span><span class="p">:</span> <span class="kt">Any</span><span class="p">)</span> <span class="p">{</span>
     <span class="k">self</span><span class="o">.</span><span class="n">loaderView</span><span class="o">.</span><span class="nf">show</span><span class="p">()</span>
     <span class="kt">InAppPurchase</span><span class="o">.</span><span class="nf">restorePurchases</span><span class="p">(</span><span class="nv">callback</span><span class="p">:</span> <span class="p">{</span> <span class="n">result</span> <span class="k">in</span>
diff --git a/docs/purchasing.html b/docs/purchasing.html
index 7a6996c..3e7ceb4 100644
--- a/docs/purchasing.html
+++ b/docs/purchasing.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
@@ -180,7 +180,7 @@ <h1 id='purchasing' class='heading'>Purchasing</h1>
 <li>finalizing transactions when product delivery is complete</li>
 <li>sending purchase request, for which successful doesn&rsquo;t always mean complete</li>
 </ul>
-<h3 id='initiating-a-purchase' class='heading'>Initiating a purchase</h3>
+<h2 id='initiating-a-purchase' class='heading'>Initiating a purchase</h2>
 
 <p>To initiate a purchase, use the <code>InAppPurchase.purchase()</code> function. It takes the <code>productIdentifier</code> and a <code>callback</code> function, called when the purchase has been processed.</p>
 
diff --git a/docs/refreshing.html b/docs/refreshing.html
index 56e094a..0897f2b 100644
--- a/docs/refreshing.html
+++ b/docs/refreshing.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/restoring-purchases.html b/docs/restoring-purchases.html
index ab44024..b0f5d86 100644
--- a/docs/restoring-purchases.html
+++ b/docs/restoring-purchases.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/search.json b/docs/search.json
index ca5875b..cb2b57b 100644
--- a/docs/search.json
+++ b/docs/search.json
@@ -1 +1 @@
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\ No newline at end of file
diff --git a/docs/server-integration.html b/docs/server-integration.html
index ab51e7d..3a3900d 100644
--- a/docs/server-integration.html
+++ b/docs/server-integration.html
@@ -22,7 +22,7 @@
         <a class="header-link" href="index.html">
           InAppPurchaseLib documentation
         </a>
-         (77% documented)
+         (95% documented)
       </p>
     
       <p class="header-col--secondary">
diff --git a/docs/undocumented.json b/docs/undocumented.json
index f5e8bed..6522d6d 100644
--- a/docs/undocumented.json
+++ b/docs/undocumented.json
@@ -9,67 +9,11 @@
     },
     {
       "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 16,
-      "symbol": "IAPPurchaseResult.state",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 17,
-      "symbol": "IAPPurchaseResult.iapError",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 18,
-      "symbol": "IAPPurchaseResult.skError",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 20,
-      "symbol": "IAPPurchaseResult.localizedDescription",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 40,
+      "line": 52,
       "symbol": "IAPRefreshCallback",
       "symbol_kind": "source.lang.swift.decl.typealias",
       "warning": "undocumented"
     },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 44,
-      "symbol": "IAPRefreshResult.state",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 45,
-      "symbol": "IAPRefreshResult.iapError",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 46,
-      "symbol": "IAPRefreshResult.addedPurchases",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPCallback.swift",
-      "line": 47,
-      "symbol": "IAPRefreshResult.updatedPurchases",
-      "symbol_kind": "source.lang.swift.decl.var.instance",
-      "warning": "undocumented"
-    },
     {
       "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Common/IAPError.swift",
       "line": 11,
@@ -90,76 +34,6 @@
       "symbol": "DefaultPurchaseDelegate.init()",
       "symbol_kind": "source.lang.swift.decl.function.method.instance",
       "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 10,
-      "symbol": "IAPProduct",
-      "symbol_kind": "source.lang.swift.decl.struct",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 30,
-      "symbol": "IAPProductType",
-      "symbol_kind": "source.lang.swift.decl.enum",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 31,
-      "symbol": "IAPProductType.consumable",
-      "symbol_kind": "source.lang.swift.decl.enumelement",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 32,
-      "symbol": "IAPProductType.nonConsumable",
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-      "warning": "undocumented"
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-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 33,
-      "symbol": "IAPProductType.nonRenewingSubscription",
-      "symbol_kind": "source.lang.swift.decl.enumelement",
-      "warning": "undocumented"
-    },
-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/IAPProduct.swift",
-      "line": 34,
-      "symbol": "IAPProductType.autoRenewableSubscription",
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-      "warning": "undocumented"
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-    {
-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/SKProductExtension.swift",
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-      "line": 13,
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-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/SKProductExtension.swift",
-      "line": 14,
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-      "file": "/Users/veronique/Documents/iap-swift-lib/Sources/InAppPurchaseLib/Product/SKProductExtension.swift",
-      "line": 20,
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diff --git a/img/ScreenshotInstallation2.png b/img/ScreenshotInstallation2.png
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