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Cards you struggle with come back sooner.

How spaced repetition works

🃏Flip each card and rate how well you remembered it.
📅Easy cards come back in days or weeks. Hard cards come back in minutes.
🎯Short daily sessions beat cramming. 10–20 new cards a day is plenty.
3️⃣A card is mastered after three correct reviews. The next one is the day after, then about a week later.
✅Mastered cards reappear occasionally so you don't forget them.