Spaced repetition that brings each card back at the right time

FSRS models how likely you are to remember each card and schedules the review for when that drops to your target. It is open, and has been tested against hundreds of millions of real reviews. In Nila you can set:

• Desired retention (90% by default) and a maximum interval.
• Learning and relearning steps.
• New cards and reviews per day.
• The order: new and review cards mixed together, or one first.
• What happens to leeches, cards you keep failing.
• Which card formats to favour in a session.

Presets let you keep different settings for different decks.

A few things Nila does that a plain scheduler doesn’t:

• Parts of one table or pathway are kept apart, so you don’t answer one cell from the cell you just saw.
• Confidence on quizzes. A lucky guess is not graded as knowing it.
• Undo a grade you tapped by mistake.
• An exam planner. Add an exam date and its decks to see your daily load, and run a final pass that brings back the cards you keep missing or haven’t seen in two weeks.

Statistics show what is due today and how long it will take, your workload over the coming days, an estimate of how much you would remember today, your rhythm and streaks, the topics you are weakest in, and the questions you are stuck on.

Spreading reviews out keeps material far longer than the same reviews done at once, and recalling an answer does more than rereading it. These are two of the best-supported findings in learning science. Read what the research says about spaced repetition.