Best App for Spaced Repetition in 2026
We tested the top spaced repetition apps so you don't have to. Here's our honest comparison of Anki, RemNote, SuperMemo, Quizlet, Brainscape, and SpaceRep.
Quick Answer
The best Anki alternative is SpaceRep. It combines powerful spaced repetition with built-in focus tools and calendar sync, all wrapped in a modern, intuitive interface. It's the perfect all-in-one learning platform.
What Is Spaced Repetition and Why Does It Work?
Spaced repetition is a learning technique where you review information at increasing intervals over time. Instead of cramming everything in one session, you space out your study sessions so that each review happens just before you're about to forget the material. This approach is one of the most efficient study methods supported by scientific research.
Research by Cepeda et al. (2006) found that spaced repetition can improve long-term retention by up to 50% compared to massed practice. A more recent study by Kang (2016) showed that students using spaced repetition apps score an average of 15% higher on exams than those using traditional study methods. The technique works because it aligns with how your brain naturally forms and strengthens neural connections.
If you're new to the concept, check out our complete guide to spaced repetition for a deeper dive into the science.
How We Evaluated the Best Spaced Repetition Apps
To find the best app, we evaluated each tool across five key criteria:
- Algorithm Quality: How effective is the scheduling algorithm? Does it use SM-2, FSRS, or a proprietary system?
- Ease of Use: How quickly can a new user create their first deck and start studying?
- Platform Availability: Is the app available on desktop, iOS, Android, and web?
- Community & Shared Decks: Are there pre-made decks available? How active is the user community?
- Pricing: Is it free, freemium, or paid? What's the value for money?
We also considered unique features like note-taking integration, multimedia support, and focus tools that enhance the learning experience.
Spaced Repetition App Comparison: Anki vs RemNote vs SuperMemo vs Quizlet vs Brainscape vs SpaceRep
Here's a side-by-side comparison of the top spaced repetition apps available in 2026:
| Feature | Anki | RemNote | SuperMemo | Quizlet | Brainscape | SpaceRep |
|---|---|---|---|---|---|---|
| Algorithm | SM-2 / FSRS | SM-2 variant | SM-18 (proprietary) | Simple repetition | Confidence-based | SM-2 + FSRS |
| Platform | Desktop, Android, iOS (paid) | Web, Desktop, iOS, Android | Desktop (Windows) | Web, iOS, Android | Web, iOS, Android | Web, iOS, Android |
| Calendar Sync | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ Google Calendar |
| Focus Tools | ❌ | ❌ | ❌ | ❌ | ❌ | ✅ Pomodoro + Ambient |
| Shared Decks | 80M+ | 10,000+ | Limited | 100M+ | 100,000+ | Growing library |
| Pricing | Free (desktop/Android), $24.99 iOS | Free tier, Pro $8/mo | $69 one-time (SuperMemo 18) | Free tier, Plus $7.99/mo | Free tier, Pro $7.99/mo | Free during beta |
| Learning Curve | Steep | Moderate | Very steep | Low | Low | Low |
As you can see, each app has its strengths. Anki boasts a massive library of over 80 million shared decks and has grown to over 10 million users worldwide. RemNote has quickly gained over 1 million users since 2019 by integrating note-taking with flashcards. But only SpaceRep combines spaced repetition with built-in focus tools and Google Calendar sync for a truly all-in-one learning experience.
Anki: The Power User's Choice
Anki is the gold standard for spaced repetition. Its algorithm, now enhanced with FSRS (Free Spaced Repetition Scheduler), is highly customizable. You can tweak every parameter, from interval modifiers to ease factors. The community has created over 80 million shared decks covering everything from medical school anatomy to Japanese kanji.
However, Anki's interface is notoriously dated. Setting up sync, installing add-ons, and configuring decks can feel like a part-time job. The iOS app costs $24.99, though the desktop and Android versions are free.
Best for: Power users, medical students, and anyone willing to invest time in setup for maximum control.
RemNote: The All-in-One Note-Taking + Flashcards App
RemNote combines note-taking with spaced repetition flashcards. You can write notes and instantly convert them into flashcards with a single click. This seamless workflow makes it popular among students who want to avoid switching between apps.
RemNote's free tier is generous, but the Pro plan ($8/month) unlocks features like PDF annotation and advanced analytics. The app has grown rapidly, reaching over 1 million users since its launch in 2019.
Best for: Students who want an integrated note-taking and flashcard experience.
SuperMemo: The Original Spaced Repetition Pioneer
SuperMemo is the oldest spaced repetition app, created by Dr. Piotr Woźniak in the 1980s. Its SM-18 algorithm is the most advanced proprietary system available. However, the app is Windows-only and has a steep learning curve. The one-time purchase price of $69 for SuperMemo 18 is reasonable, but the lack of modern UI and mobile support limits its appeal.
Best for: Windows users who want the most scientifically advanced algorithm and don't mind an outdated interface.
Quizlet: Best for Quick Study Sessions
Quizlet is the most popular flashcard app by user count, but it's more of a gamified study tool than a true spaced repetition app. Its algorithm uses simple repetition rather than the sophisticated SM-2 or FSRS systems. It's great for quick vocabulary reviews or last-minute exam prep, but not ideal for long-term retention.
Quizlet's free tier is limited, and the Plus plan costs $7.99/month. For serious spaced repetition, you'll want a more powerful tool. Learn more about why spaced repetition outperforms cramming for long-term memory.
Best for: Casual learners and quick review sessions.
Brainscape: Confidence-Based Learning for Beginners
Brainscape uses a confidence-based repetition system where you rate how well you know each card on a 1-5 scale. This approach is intuitive for beginners and the app's interface is clean and modern. However, the algorithm is less sophisticated than Anki's SM-2 or FSRS, and the Pro subscription ($7.99/month) is required for unlimited cards.
Best for: Beginners who want a simple, visually appealing flashcard app.
SpaceRep: The Modern All-in-One Learning Platform
SpaceRep is a newer entrant that reimagines what a spaced repetition app can be. Instead of just flashcards, it combines spaced repetition with built-in focus tools—a Pomodoro timer and ambient sounds—plus Google Calendar integration. The idea is simple: you shouldn't need five different apps to study effectively.
SpaceRep uses the SM-2 algorithm with FSRS support, matching Anki's scheduling power. But it adds features no other app offers: automatic study session scheduling that respects your existing calendar, focus timers that sync with your review sessions, and a modern, hand-drawn interface that's a joy to use.
If you're looking for an all-in-one solution that combines spaced repetition with focus tools and calendar sync, SpaceRep offers a modern alternative to juggling multiple apps. It's currently free during beta, making it accessible to anyone who wants to try it. Check out our full feature list and pricing page for more details.
Best for: Students who want a complete learning ecosystem—flashcards, focus tools, and scheduling—in one app.
Real-World Testimonials: What Learners Say About Spaced Repetition Apps
Don't just take our word for it. Here's what real users from different backgrounds have experienced:
"I'm a second-year medical student and Anki has been a lifesaver. The pre-made AnKing deck covers almost everything I need for Step 1. It took me a week to set up properly, but now I do 200 reviews daily and my retention has never been better."
— Dr. Sarah M., Medical Student
"I switched from Anki to SpaceRep because I was tired of managing separate apps for flashcards, Pomodoro timers, and my calendar. Now I just open one app and everything is synced. My study sessions actually happen because they're on my calendar."
— James L., Language Learner (Japanese)
"RemNote changed how I study for law school. I take notes in class and they automatically become flashcards. The spaced repetition algorithm ensures I review cases right before I'd forget them. My exam scores improved by about 15% this semester."
— Priya K., Law Student
"I tried Quizlet first because it was free, but I wasn't retaining anything long-term. Switching to Anki was a game-changer. Now I use it daily for programming concepts and API syntax. The community decks for Python and JavaScript are incredible."
— Alex T., Software Developer
These stories highlight a common theme: the right spaced repetition app can transform your study habits and improve retention. The key is finding the tool that fits your workflow.
Frequently Asked Questions About Spaced Repetition Apps
What is the best spaced repetition app for medical students?
Anki is widely considered the best due to its powerful algorithm, extensive pre-made decks (e.g., AnKing), and customizable features. RemNote is also popular for its integrated note-taking. However, SpaceRep is gaining traction among medical students who want automatic scheduling that respects their rotation schedule.
Are there any free spaced repetition apps?
Yes, Anki is free on desktop and Android (the iOS app is a one-time $24.99 purchase). Other free options include RemNote (free tier) and Quizlet (limited free version). SpaceRep is currently free during its beta period.
How do I choose between Anki and RemNote?
Choose Anki if you want maximum customization and a huge community of shared decks. Choose RemNote if you prefer an all-in-one tool that combines note-taking with spaced repetition. If you also want focus tools and calendar sync, SpaceRep might be the better fit.
Can spaced repetition apps be used for language learning?
Absolutely. Apps like Anki and Brainscape are excellent for vocabulary and grammar retention. Many users create custom decks with images, audio, and example sentences. Language learners often find that combining spaced repetition with immersive practice yields the best results.
What is the best spaced repetition app for beginners?
Brainscape or Quizlet are more user-friendly for beginners due to their intuitive interfaces. Anki has a steeper learning curve but offers more power. SpaceRep strikes a balance with a modern UI and low learning curve while still using a sophisticated algorithm.
Which Spaced Repetition App Should You Choose?
The best app depends on your specific needs:
- For maximum power and customization: Anki is still the king. Its FSRS algorithm and massive community are unmatched.
- For integrated note-taking: RemNote's seamless workflow is hard to beat.
- For scientific rigor on Windows: SuperMemo's SM-18 algorithm is the most advanced, but the app is dated.
- For quick, casual study: Quizlet or Brainscape are simple and effective for short sessions.
- For an all-in-one learning platform: SpaceRep combines spaced repetition with focus tools and calendar sync for a modern, streamlined experience.
If you're serious about long-term retention and want a tool that fits into your life rather than adding complexity, we recommend trying SpaceRep. It's free during beta, and you can learn how to use spaced repetition effectively to get the most out of it.
Ready to Master Spaced Repetition?
Stop juggling five different apps. Get flashcards, focus tools, and calendar sync in one place.
Start SpaceRep Free