Beyond Anki: The Best Spaced Repetition Apps in 2025 (And When to Use Each)

Spaced repetition is the most effective method for memorizing large amounts of information. The science is clear: reviewing material at optimal intervals dramatically improves long-term retention.

But here's the problem: the most powerful spaced repetition app (Anki) has a learning curve steeper than the content you're trying to learn.

This guide covers the best SRS apps in 2025, from the ultra-customizable to the beginner-friendly, so you can find the right tool for your learning goals.

What Is Spaced Repetition?

Spaced repetition systems (SRS) schedule reviews based on how well you know each item. Items you struggle with appear more frequently; items you know well appear less often.

The result: You spend time on what you need to learn, not what you already know.

The science: Studies show spaced repetition produces 200% better retention than massed practice (cramming).

The Best Spaced Repetition Apps in 2025

1. Anki — The Power User's Choice

Best for: People who want complete control and don't mind complexity

Platform: Windows, Mac, Linux, iOS ($25), Android (free), Web

Anki is the gold standard of spaced repetition. It's free (mostly), infinitely customizable, and has a massive community creating shared decks.

Strengths:

• ✅ Completely free on desktop and Android
• ✅ Unlimited customization
• ✅ Thousands of shared decks
• ✅ Supports images, audio, video, cloze deletions
• ✅ Powerful add-on ecosystem
• ✅ Works offline

Weaknesses:

• ❌ Steep learning curve
• ❌ Dated, unintuitive interface
• ❌ iOS app costs $25
• ❌ Deck quality varies wildly
• ❌ Setup takes hours for optimal use
• ❌ Sync can be unreliable

Pricing: Free (desktop/Android), $25 one-time (iOS)

Verdict: If you're tech-savvy and want maximum flexibility, Anki is unbeatable. If you want to start learning today without a setup project, look elsewhere.

If Anki's learning curve is too steep, HSKLord offers the same SRS science with zero setup — especially for HSK learners.

2. HSKLord — Purpose-Built for Chinese

Best for: Chinese learners preparing for HSK tests

Platform: Web (works on all devices)

HSKLord combines spaced repetition with HSK-structured content. Instead of building decks or finding quality shared content, everything is ready to go.

Strengths:

• ✅ Zero setup required
• ✅ Complete HSK 1-6 vocabulary
• ✅ Optimized SRS algorithm
• ✅ Native audio and example sentences
• ✅ Clean, modern interface
• ✅ Free tier available

Weaknesses:

• ❌ Chinese/HSK focused only
• ❌ Can't create custom decks
• ❌ Web-only (no native mobile app)

Pricing: Free tier, Premium $8 USD/month

Verdict: For Chinese learners, HSKLord eliminates the biggest Anki problems: finding quality decks, organizing by level, and getting native audio. The trade-off is less customization.

3. RemNote — SRS Meets Note-Taking

Best for: Students who want to combine notes and flashcards

Platform: Windows, Mac, Linux, iOS, Android, Web

RemNote integrates spaced repetition into a note-taking system. You can create flashcards directly from your notes.

Strengths:

• ✅ Notes and flashcards in one app
• ✅ Create cards from highlights
• ✅ Good for academic studying
• ✅ Modern interface
• ✅ Free tier available

Weaknesses:

• ❌ Can be overwhelming
• ❌ Less focused than dedicated SRS apps
• ❌ Premium features expensive ($8/month)
• ❌ Learning curve for full features

Pricing: Free tier, Pro $8/month

Verdict: Great if you take lots of notes and want integrated flashcards. Overkill if you just want to memorize vocabulary.

4. Memrise — Gamified SRS

Best for: Casual learners who want motivation

Platform: iOS, Android, Web

Memrise adds gamification to spaced repetition, making review sessions feel more like a game than a chore.

Strengths:

• ✅ Fun, engaging interface
• ✅ Video clips of native speakers
• ✅ Pre-made courses for many languages
• ✅ Motivating streak system

Weaknesses:

• ❌ Subscription required for full access ($9/month)
• ❌ Less effective algorithm than Anki
• ❌ Limited customization
• ❌ Course quality varies

Pricing: Free tier, Premium $8.99/month or $90/year

Verdict: Good for staying motivated, but the gamification can distract from efficient learning.

5. Quizlet — Simple and Popular

Best for: Students, quick study sessions

Platform: iOS, Android, Web

Quizlet is the most popular flashcard app, though its spaced repetition is less sophisticated than dedicated SRS apps.

Strengths:

• ✅ Easy to use
• ✅ Huge library of shared sets
• ✅ Good for quick studying
• ✅ Collaborative features

Weaknesses:

• ❌ Weak spaced repetition algorithm
• ❌ Premium required for best features ($36/year)
• ❌ Designed for cramming, not long-term retention
• ❌ Ads in free version

Pricing: Free tier, Plus $36/year

Verdict: Fine for cramming before a test, but not ideal for long-term memorization.

6. SuperMemo — The Original SRS

Best for: Hardcore optimizers

Platform: Windows, Web, iOS, Android

SuperMemo invented spaced repetition algorithms. It's extremely powerful but has the worst user interface of any modern app.

Strengths:

• ✅ Most advanced algorithm
• ✅ Incremental reading features
• ✅ Decades of development

Weaknesses:

• ❌ Terrible user interface
• ❌ Windows-only for full features
• ❌ Expensive subscription
• ❌ Steep learning curve

Pricing: Free trial, then subscription

Verdict: Only for people obsessed with optimization who can tolerate a painful interface.

Comparison Table

Choosing the Right App for Your Goal

Learning a Language (General)

Best choice: Anki with quality shared decks, or Memrise for motivation

Why: Language learning requires thousands of vocabulary words. You need a robust algorithm and quality content.

Learning Chinese Specifically

Best choice: HSKLord for vocabulary, supplemented with Anki for custom content

Why: Chinese has specific challenges (characters, tones, HSK levels) that purpose-built apps handle better.

For Chinese specifically, HSKLord combines SRS with HSK-structured decks, native audio, and example sentences. No deck-building required.

Medical/Law School

Best choice: Anki with pre-made decks (AnKing for medical)

Why: These fields have established, high-quality shared decks that save hundreds of hours.

General Knowledge/Trivia

Best choice: Quizlet or Memrise

Why: Casual learning doesn't require the most sophisticated algorithm.

Academic Studying (College)

Best choice: RemNote or Anki

Why: The ability to create cards from notes saves time and integrates with your workflow.

The Anki Question

Most SRS discussions end with "just use Anki." And for some people, that's right. But Anki's complexity creates real problems:

Time to first card:

• Anki: 30-60 minutes (install, configure, find deck, set up)
• HSKLord: 2 minutes (open website, start learning)

Time to optimize:

• Anki: 10+ hours learning settings, add-ons, and deck creation
• Purpose-built apps: Already optimized

The hidden cost of Anki: Many people spend more time configuring Anki than actually learning. They install add-ons, tweak settings, redesign card templates — and never establish a consistent study habit.

The rule: If you'll actually use Anki consistently, it's the best tool. If Anki's complexity will stop you from studying, use something simpler.

What Makes an SRS Algorithm "Good"?

Not all spaced repetition is equal. Key factors:

1. Interval Calculation

How does the app decide when to show a card again? Simple apps use fixed intervals; sophisticated apps adapt to your performance.

2. Difficulty Assessment

Can you rate how hard a card was? This feedback improves scheduling.

3. Handling Lapses

What happens when you forget a card? Good algorithms don't completely reset your progress.

4. New Card Introduction

How are new cards mixed with reviews? Too many new cards overwhelms; too few slows progress.

Apps with strong algorithms: Anki, SuperMemo, HSKLord Apps with basic algorithms: Quizlet, basic Memrise

Building a Sustainable SRS Habit

The best algorithm means nothing if you don't use it. Tips for consistency:

Start Small

• Begin with 10 new cards/day maximum
• Build up gradually as reviews stabilize

Same Time Every Day

• Morning reviews work well (fresh mind)
• Attach to existing habit (after coffee, before work)

Don't Skip Days

• Backlogs accumulate fast
• 10 minutes daily beats 70 minutes weekly

Be Honest

• Don't mark cards "easy" if you struggled
• Cheating yourself breaks the algorithm

My Recommendations

If you want maximum power and flexibility:

Use Anki. Accept the learning curve. Join r/Anki for help.

If you're learning Chinese:

Use HSKLord. The HSK organization and native audio solve Chinese-specific problems.

If you want simplicity:

Use Memrise or Quizlet. They're less optimal but you'll actually use them.

If you take lots of notes:

Use RemNote. The integration saves time.

The best SRS app is one you'll actually open daily. Try HSKLord free and see if it sticks.

Conclusion

Spaced repetition works. The science is settled. The question is which app fits your learning style and goals.

For power users, Anki remains king. For Chinese learners, purpose-built apps like HSKLord eliminate setup friction. For casual learners, gamified apps like Memrise maintain motivation.

The worst choice is spending weeks researching apps instead of learning. Pick one, start today, and adjust if needed.

Related Articles:

• Spaced Repetition for Chinese
• Best Chinese Learning Apps in 2025
• How to Use Flashcards Effectively

FAQ

What is the best free spaced repetition app in 2026?

Anki remains the most powerful free option, but it requires significant setup time. For Chinese learners specifically, HSKLord offers a 30-day free trial with zero configuration needed — just pick your HSK level and start reviewing.

Is Anki still the best spaced repetition app?

Anki is still the most customizable SRS tool, but newer alternatives like HSKLord, Memrise, and RemNote offer better user experiences and subject-specific content. The best choice depends on what you're studying.

What is the best spaced repetition app for Chinese?

For HSK vocabulary specifically, HSKLord is purpose-built with all HSK 1-6 vocabulary pre-loaded. Unlike Anki, there's no deck setup required — pick your level and start in 60 seconds.

How does spaced repetition work?

Spaced repetition shows you flashcards at increasing intervals based on how well you know them. Words you struggle with appear more frequently, while mastered words appear less often. This optimizes long-term memory retention.

Frequently Asked Questions

What is the best free spaced repetition app in 2026?+

Is Anki still the best spaced repetition app?+

What is the best spaced repetition app for Chinese?+

How does spaced repetition work?+