A spaced repetition flashcard app with the main focus on creating flashcards together. Sharing is still missing, but we are starting to work on it: https://play.google.com/store/apps/details?id=com.space.spac... or https://apps.apple.com/us/app/space-spaced-repetition/id1546....

I'm still a student and started programming the app with a friend because I wanted to learn physics with my classmates. But the other apps Anki, Brainscape and Quizlet have a pretty bad UX to create flashcards collaboratively, so I started working on it.