Recall

Recall is a truly effective flashcard learning App powered by the FSRS-5 spaced repetition algorithm - the most accurate memory scheduling algorithm currently available, which allows you to review at the moment when you're "just about to forget", maximizing efficiency.
Learn smart, not hard.
No longer waste time on cards you've already memorized. Recall schedules each card individually based on your memory, presenting the content that most needs review at the most suitable time.
An extremely smooth review experience.
Elastic animated card flipping, swipe left to start over, swipe right for simplicity, or use four levels of scoring to precisely tell the system how well you remember - the next review interval will be displayed clearly below each button.
Home screen widgets.
View the number of cards to be reviewed, consecutive learning days, and mastery rate on the home screen without opening the App. Supports both small and medium sizes.
Import and export.
Supports importing flashcards from Excel (.xlsx), CSV, TSV, or text files - each worksheet in Excel automatically becomes a deck. Any deck can be exported as CSV for easy sharing or backup.
Keep learning a little bit every day.
The consecutive learning days are always displayed at the top. Recall records your daily learning, sets daily reminders, and you'll never forget to review.
Automatic synchronization across all devices.
Your decks, cards, and progre...