iOS app choose server endpoint

[5cat]

I'm self hosting languagetool and wondering if I could make my iOS app use the my languagetool server instead of the cloud one.
If the native iOS app does not support this, are there 3rd party iOS apps that utilize languagetool such that I can use it on my phone?

[kris-anderson]

I mentioned this here for a similar macOS app request: #7628 (comment)

But wanted to post here as well that I'm also interested in this functionality (and willing to pay).

I would also love this feature, and would happily pay a subscription for this capability.
Sending all the text I type to a third party is a non-starter for me. But let me self host and point the macOS and hopefully iOS app at my self hosted instance... take my money!