The app looks great. Dark mode would be nice though.

Tab to guess correct and incorrect would also be nice so you don't have to take the hands off the keyboard.

I really liked the multiple choice system Memrise used to have. This behaves too much like Anki. I actually don't like Anki because of how it works, and this app is more or less the same(?) However, there are plenty of people who love anki, so I think you will do well.

I would be more interested in the app if there was multiple choice.