Meet Anki

Anki is the gold-standard flashcard app for spaced repetition. It is free, open-source, and used by medical students, language learners, and professionals worldwide. You make a card with a question on one side and the answer on the other, and Anki decides when to show it again based on how well you recalled it.

• Again: you forgot, shown again soon
• Hard: a struggle, shorter interval
• Good: recalled correctly, interval grows
• Easy: instant recall, much longer interval

Anki handles the scheduling so you can focus on learning. Over time, easy cards almost vanish from your deck while hard ones keep coming back until they stick.