Best Spaced Repetition Apps in 2025: Complete Comparison
Choosing the right spaced repetition app can be the difference between acing your exams and forgetting everything by next week. We tested the top 5 apps to help you decide.
Quick Comparison
| App | Best For | Price | Calendar Integration |
|---|---|---|---|
| SpaceRep | Optimization & Calendar | Free (Beta) | ✅ Native (Google Cal) |
| Anki | Customization | Free (Desktop), Paid (iOS) | ❌ No |
| Quizlet | Pre-made Decks | Freemium | ❌ No |
| RemNote | Note-Taking | Freemium | ❌ No |
SpaceRep
Best for Google Calendar Integration
SpaceRep is built for students who need their study schedule to adapt to their life. Unlike other apps that create a siloed list of reviews, SpaceRep puts your sessions directly into Google Calendar.
Pros: Conflict-aware scheduling, beautiful hand-drawn interface, seamless integration.
Cons: Still in beta (adding features rapidly).
Anki
Best for Customization
Anki is the open-source giant. It's powerful and highly customizable with add-ons. However, the interface is dated ("Windows 95 style") and the learning curve is steep.
Quizlet
Best for Pre-made Decks
Quizlet is great if you want to find a deck for your specific textbook chapter. It's more of a "gamified" flashcard app than a serious spaced repetition tool (though they have added some features).
How to Choose the Right Spaced Repetition App
- For serious long-term retention: Choose SpaceRep or Anki. (The algorithms are superior).
- For visual learners: SpaceRep (better UI).
- For sharing decks: Quizlet.
- For busy students: SpaceRep's calendar integration ensures you actually do the work.