Onki

Learn anything with Onki.  Onki is an Anki-inspired memorization app built around a modified FSRS algorithm (Free Spaced Repetition Scheduler). FSRS adapts to your memory strength so you spend the least amount of time studying while retaining more.

Here's how it works: once a day, Onki shows you only the cards you're due to review. After each card, you rate how well you remembered it, and FSRS reschedules it for the right day in the future. Pick "Forget" and the card resets — its memorization process starts over from the beginning.

Free, now and forever. No ads, no gimmicks. Every in-app purchase is just a tip or a donation.