Best Spaced Repetition Apps in 2025 (Anki Alternatives Included)
If you've ever crammed for an exam only to forget everything a week later, you already understand why spaced repetition apps matter. Spaced repetition is one of the most research-backed learning techniques ever studied — and in 2025, there are more powerful, polished tools than ever to help you use it. Whether you're learning a new language, studying for a professional certification, or trying to retain insights from the books you read, the right app can be the difference between knowledge that sticks and knowledge that vanishes.
This guide breaks down the best spaced repetition apps available right now, including the best Anki alternatives, top flashcard apps for iOS, and one habit-based learning tool that takes a completely different (and arguably more sustainable) approach to long-term retention.
What Is Spaced Repetition — and Why Does It Work?
Before diving into the app list, let's quickly establish why spaced repetition deserves your attention.
Spaced repetition is a learning technique that schedules review sessions at strategically increasing intervals. Instead of reviewing everything daily, you review information just before you're about to forget it. The concept is grounded in Hermann Ebbinghaus's famous Forgetting Curve — research from the 1880s that showed memory decays predictably over time, but each review resets and strengthens the retention curve.
Modern research backs this up powerfully. A 2008 study published in Psychological Science by Cepeda et al. found that spaced practice produced 10–30% better long-term retention compared to massed practice (cramming). Cognitive scientist Dr. Robert Bjork at UCLA has built much of his career on what he calls "desirable difficulties" — and spacing is the most desirable difficulty of all.
The practical takeaway: Reviewing a flashcard today, again in 3 days, then 10 days, then 30 days is vastly more efficient than reviewing it every single day. The best apps automate this scheduling so you don't have to think about it.
The Best Spaced Repetition Apps in 2025
1. Anki — The Gold Standard (But Not for Everyone)
Platforms: Windows, Mac, Linux, Android, iOS (AnkiMobile) Price: Free on desktop, $34.99 for AnkiMobile on iOS Best for: Students, medical professionals, power users
Anki remains the most powerful and customizable spaced repetition tool ever built. It uses the SM-2 algorithm (developed by Piotr Wozniak) to schedule card reviews, and its open-source nature means a massive community has built thousands of pre-made decks for everything from USMLE medical licensing to Japanese Kanji.
What Anki does well:
- Fully customizable review intervals and card formats
- Shared deck library with 10,000+ community-built decks
- Syncs across devices via AnkiWeb
- Supports images, audio, LaTeX, and cloze deletions
- Proven algorithm with decades of real-world validation
Where Anki struggles:
- The desktop UI looks like it was designed in 2005 (because it largely was)
- The iOS app costs $34.99 — a steep one-time fee
- Steep learning curve — card creation and deck management can be overwhelming for beginners
- No built-in content library for general learning
- Feels like a tool built for power users, not casual learners
If you're willing to invest the time to master it, Anki is unmatched. But many people find it too clunky and abandon it within weeks.
2. Duolingo — Gamified Spaced Repetition for Language Learning
Platforms: iOS, Android, Web Price: Free (Duolingo Max: ~$14.99/month) Best for: Casual language learners
Duolingo doesn't advertise itself as a spaced repetition app, but its lesson structure uses spaced review principles under the hood. The app's legendary streak system is genuinely effective at building daily review habits — which is, after all, the hardest part of spaced repetition in practice.
Strengths:
- Beautifully designed and highly engaging
- Effective for vocabulary building in 40+ languages
- Habit-forming streak mechanics
- Free tier is genuinely usable
Limitations:
- Useful mainly for language learning only
- Repetition algorithm is less sophisticated than Anki
- Gamification can feel patronizing for advanced learners
3. Readwise — Spaced Repetition for Book Readers
Platforms: iOS, Android, Web Price: Free trial, then $7.99/month Best for: Avid readers who want to retain insights from books
Readwise takes a brilliantly simple approach: it syncs your Kindle highlights, Apple Books annotations, and Instapaper saves, then resurfaces them daily using spaced repetition. If you read a lot but retain little, this tool is transformative.
Standout features:
- Automatic import of highlights from Kindle, Apple Books, Pocket, Instapaper, and more
- Daily "Review" sessions that surface highlights you're likely to forget
- Mastery ratings to control which highlights get reviewed more
- Integrates with Notion, Obsidian, and Roam for knowledge management
- Readwise Reader extends this to articles, PDFs, and newsletters
Limitations:
- Doesn't help you create original knowledge — only reviews existing highlights
- Monthly cost adds up over time
If you consume a lot of books and want to actually use what you've read, Readwise is one of the best investments you can make in your learning system. For more on building a reading-based learning system, explore our guide to the best learning apps for personal growth.
4. RemNote — Spaced Repetition Meets Note-Taking
Platforms: iOS, Android, Web Price: Free (Pro: $8/month) Best for: Students and knowledge workers who think in connected ideas
RemNote is a note-taking app with native spaced repetition baked directly into the writing interface. You can convert any piece of text into a flashcard with a single keystroke, and it automatically schedules reviews using an SM-2-based algorithm.
What makes RemNote unique:
- Notes and flashcards live in the same document
- Concept maps and knowledge graphs make connections visible
- PDF annotation with built-in flashcard creation
- Works like Notion or Roam but with SRS built in
Limitations:
- Can feel overwhelming — the feature set is large
- Mobile app is less polished than the desktop version
- Requires intentional setup to get the most value
5. Brainscape — Confidence-Based Repetition
Platforms: iOS, Android, Web Price: Free (Pro: $9.99/month) Best for: Structured learners who prefer curated content
Brainscape uses a Confidence-Based Repetition (CBR) model — after reviewing a card, you rate your confidence from 1–5, and the algorithm prioritizes your weaker cards. It also has a large marketplace of professionally created decks for LSAT, GRE, nursing boards, real estate exams, and more.
Strengths:
- Clean, modern interface
- Professional deck marketplace (some decks are expensive, but quality is high)
- Simple confidence rating system is intuitive for beginners
- Good mobile experience
Limitations:
- Premium content can be pricey on top of the subscription
- Less flexible than Anki for custom card types
6. Quizlet — The Classroom Favorite Gets Smarter
Platforms: iOS, Android, Web Price: Free (Quizlet Plus: $35.99/year) Best for: High school and college students
Quizlet has been a student staple for years, but its Learn mode now uses adaptive spaced repetition to personalize review sessions. The AI-powered features added in 2024–2025 make it more dynamic than ever.
Strengths:
- Enormous library of user-created study sets
- Multiple study modes (flashcards, tests, matching games)
- AI-generated practice questions
- Highly social — share and collaborate on decks
Limitations:
- Free tier is increasingly limited
- Algorithm is less rigorous than Anki or RemNote
7. DailyWins — Spaced Learning Through Daily Habits and Book-Backed Tasks
Platforms: iOS Price: Free Best for: People focused on personal growth, habit-building, and applied learning
DailyWins takes a fundamentally different approach to the spaced repetition problem. Instead of asking you to review flashcards, it embeds learning directly into daily habit challenges drawn from the world's most impactful personal development books.
The insight behind DailyWins is powerful: the best way to remember something is to do it. Procedural memory — memory formed through action — is far more durable than declarative memory formed through rote review. When you complete a daily challenge based on a principle from Atomic Habits or The Power of Now, you're not just reading about the concept — you're living it.
What makes DailyWins different:
- Daily tasks are grounded in evidence-based books and research
- Habit tracking creates natural review spacing through repetition-over-time
- Combines reflection prompts with action — not just passive review
- Completely free on iOS
- Designed for sustainable, long-term behavior change rather than test prep
Who it's for: DailyWins isn't the right tool if you need to memorize 2,000 Japanese vocabulary words before a trip. But if you're trying to become a better leader, build healthier routines, or apply the insights from your reading to your actual life, it offers something no flashcard app can: accountability through action.
You can read more about how DailyWins fits into a complete personal growth stack on our learning tools overview page.
How to Choose the Right Spaced Repetition App for You
With so many options, the right choice comes down to your specific goal:
| Goal | Best App |
|---|---|
| Medical/law/professional exam prep | Anki |
| Language learning | Duolingo + Anki |
| Retaining insights from books | Readwise |
| Academic study + note-taking | RemNote or Quizlet |
| Personal growth and habit building | DailyWins |
| General knowledge with curated decks | Brainscape |
The 3 Questions to Ask Before Downloading Any Learning App
- What am I actually trying to achieve? Memorizing facts vs. changing behavior requires very different tools.
- How much time can I realistically commit daily? The best app is the one you'll actually use. A 5-minute daily habit beats a 2-hour weekly binge.
- Does the app support active recall? Passive re-reading is one of the least effective study methods. Look for apps that test you, not just show you.
Combining Tools: The Spaced Repetition Stack That Actually Works
For most people committed to serious personal growth, the ideal setup involves more than one tool:
- Readwise → resurfaces highlights from everything you read
- Anki (or RemNote) → deepens retention of critical facts and concepts
- DailyWins → turns knowledge into action through daily habit challenges
This stack covers all three stages of effective learning: acquisition (reading), retention (flashcard review), and application (daily practice). Most people master the first stage and ignore the other two. Explore the science of habit-based learning to understand why application is the most overlooked piece of the retention puzzle.
The research supports this layered approach. A 2021 meta-analysis in Educational Psychology Review found that retrieval practice combined with real-world application produced significantly better long-term retention than either method alone. In other words: testing yourself AND doing the thing beats just testing yourself.
Try DailyWins Free — Turn What You Learn Into What You Do
Reading about spaced repetition is a great start. Actually using it consistently is where the magic happens.
DailyWins is a free iOS app that makes daily learning automatic. Every day, you get book-backed tasks, habit challenges, and reflection prompts designed to help you grow — not just know. It's the app for people who are tired of consuming self-improvement content without actually improving.
✅ Free to download ✅ No subscription required ✅ Science-backed daily challenges ✅ Built for real habit change, not just knowledge accumulation
👉 Download DailyWins free on the App Store
Stop forgetting what you learn. Start using it.
Looking for more tools and strategies to accelerate your learning? Check out our complete guide to the best learning apps for personal growth for deeper dives, comparisons, and recommendations tailored to your goals.