It uses the same FSRS as Anki. You can see some of the logic in my open source version of the app here https://github.com/Amber-Williams/language-flashcard-app-

It uses the same FSRS as Anki. You can see some of the logic in my open source version of the app here https://github.com/Amber-Williams/language-flashcard-app-gpt4 https://github.com/Amber-Williams/language-flashcard-app-gpt... Anki uses this FSRS which is an open sourced algorithm https://github.com/open-spaced-repetition/fsrs4anki https://github.com/open-spaced-repetition/fsrs4anki