Hey everyone, let me get straight to the point:
Some themes aren't really that popular as far as I know so I will drop support for them, first of all because they aren't really my cup of tea in the first place, then because I never heard of anyone asking an update for them anyway...
Here are the list of the themes getting dropped:
Red
Mint (I never used you in the first place)
Au (not really sure about this one)

The list may change in case someone comes out saying that they love X theme or something, but for now that's how it is

Bear in mind that I still have to do some fixes on all the themes, you probably noticed that in some of the cloud themes there are a few inconsistencies or stuff plain broken, going to fix it in the next few days as I'm in the process of rewriting the app and freeing it from the spaghetti mess that it is plus some side projects

Hey everyone, the Telegram Desktop cloud theme variant has been added to the respective theme you already installed on your phone! Go on and have fun with these! (except FIRE)

About iOs support, thanks for requesting it but I won't be able to fullfill those requests, not because I don't want to, but because I don't have an iPhone, sorry for that!

Hey everyone, since remaking the app is taking me more than what I imagined, I will push a small fix to point to the new themes in a few hours, hopefully I can get the proper update before 2020

Edit: The update is rolling out just now

Definitely Purple
https://t.me/addtheme/DefinitelyPurple