Leitner Box helps you make your own questions and review them every day.

Write a question and an answer. Each day the app asks the cards that are due. If you know it, the card moves to the next box. If you don't, it goes back to box one. Review gaps are 1, 2, 4, 8 and 16 days.

You can create cards, review with I knew it / I didn't, see all cards in the vault, and track five Leitner boxes.

The first week is free. After that, a one-time in-app purchase unlocks the app forever.

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