Practice

Five boxes

Every card lives in one of five boxes. A card you have never studied is new. When you answer it right for the first time, it goes to box 2. A miss puts it in box 1. After that, each right answer moves the card up one box, and each miss sends it back to box 1. Boxes wait 1, 2, 4, 8 and 16 days before a card is due again.

This is a simple model inspired by the Leitner system, not a law of memory. People forget at different speeds, so treat the waits as a guide. Read more in the Leitner system explained and on the Methodology and Sources page.

Rewards for showing up

Each reviewed card earns 10 XP, and finishing a session adds a bonus. XP raises your level, from 1 to 10. A streak counts the days you study, and one rest day a week will not break it. You can earn 19 badges, collect a stamp for each guide you open by playing, and unlock card covers as you level up. You can also set a weekly goal that fits your schedule.

These are only motivation. They have no cash value, nothing can be redeemed, there are no rankings, and nothing is tied to advertising.

Guide stamps

Every guide opens with a short preview. To read the rest, play a round of five cards from that guide’s deck, or choose to read without playing. A round earns the guide’s stamp, and your stamp collection lives in the Rewards tab. You never need an account.

Your own decks

Create a deck from your notes with up to 500 cards, each with a short front and back. You can paste many cards at once, export a deck as a CSV file, and print it as folded study cards, eight to a Letter page.