I’m working on Vocabuo (https://vocabuo.com/), a vocabulary-focused language learning app.

Two main differences between this and other Anki-like apps: 1) The words you learn are from YT videos, websites and ebooks you import in the app. 2) The flashcards are optimized specifically for learning vocabulary - cards automatically get audio, images, multiple sentence examples, words definitions etc. It can also create fully monolingual flashcards with just definitions or the words in dialogs.

My biggest flex is that I have users who have done more swipes than me (over 100,000).