Spaced repetition:
The science of remembering
Why you forget what you study—and how to fix it with optimally-timed reviews.
The Forgetting Curve
Discovered by Hermann Ebbinghaus in 1885. Still true today.
Without review, here's how much you retain:
After 1 month, you've forgotten ~80% of what you learned. Unless you review strategically.
How spaced repetition fixes this
Review at increasing intervals, right before you'd forget
Each review takes seconds, but the memory lasts months. That's the power of timing.
Compared to other methods
Spaced repetition in Cruxly
Traditional spaced repetition apps (like Anki) are powerful but require you to manually create every card. That's hours of typing before you can even start.
Cruxly flips this: photo your notes → AI generates questions → spaced repetition handles the rest.
Our algorithm tracks what you know and schedules reviews at optimal times. You just open the app and study what it tells you to. Simple.
Want Anki's algorithm for long-term review? Export your Cruxly quizzes to Anki format with one tap (Student plan).
FAQ
How does spaced repetition work?
You review information right before you'd forget it. Each successful recall extends the time until next review. This exploits how memory works—difficulty at retrieval strengthens the memory.
Is Anki the best spaced repetition app?
Anki has the most customizable algorithm (FSRS/SM-2). But it requires manual card creation and has a steep learning curve. Cruxly offers simpler spaced repetition with automatic card generation.
How long until I see results?
You'll notice improved recall within 1-2 weeks. Long-term retention benefits build over months. The key is consistency—daily short sessions beat weekly marathons.
Can I overdo spaced repetition?
If you're spending hours daily on reviews, you may have too many cards. Start with fewer cards, well-learned, rather than many cards poorly remembered.