Spaced repetition that actually sticks (even offline)
Why cramming fails, how spaced repetition rebuilds memory on a schedule, and how Lumo's adaptive flashcards keep working when your wifi doesn't.
Cramming feels productive and forgets fast. The research is blunt: information reviewed once decays within days. Information reviewed on a widening schedule can last for months. That schedule is what spaced repetition automates.
The forgetting curve, briefly
Each time you successfully recall something, the memory gets a little more durable — and the next review can wait a little longer. Miss it, and the interval shrinks so you see it sooner. Good software just rides that curve for you.
The goal isn't to review more. It's to review right before you'd forget — the point where recall does the most work.
How Lumo schedules your cards
When Lumo turns a source into flashcards, each card carries its own review state:
- Rate a card Easy and the interval jumps.
- Rate it Hard and it comes back soon.
- New and lapsed cards are interleaved so sessions stay short.
A typical due session is six to ten minutes — small enough to do between classes.
It works offline
Flashcards and quizzes are cached on your device. On a train, on a flight, in a dead-zone classroom — your due cards are still there. Any reviews you do are queued locally and sync the moment you reconnect, so your streak survives bad wifi.
- Generate cards from any note.
- Drill them anywhere, online or off.
- Reviews flush automatically when you're back online.
Start a deck from your next note and let the schedule do the remembering. See how it fits together in nine study formats.
Try it on your own material
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