Add a dark theme

[behrmann]

It would be great if you could add a dark theme, because the white is glaringly bright. :)

[exviva]

You mean that the app should detect the theme of the phone and switch automatically, or that there should be an option in the app's settings to select a theme?

[behrmann]

An option in the app itself would be best, I guess. Maybe a switcher for the white background colour and the red accent colour. That would mean adding a settings menu to the app.

[exviva]

I'm going to keep this issue open for now, it's not high on my priority list, if anyone feels like submitting a PR, go ahead :).