It seems pretty good but your app is only targetting German right? I'm learning another language.

Right now I'm using this one : https://play.google.com/store/apps/details?id=flashcards.wor...

Which seems the only one I found supporting auto-TTS in lots of languages which you can toggle in the settings.

The UI is truly awful though and the space repetition algorithm is kind of borked.

Ah, unfortunate. I will be adding more languages, but it will take some time. I prefer to have really figured out how to make the app great for German and then expanding, rather then doing everything at once.

Yeah that makes sense, the UI seems pretty good though, we are very far from what I'm using now. I could see myself using it if I was learning German.