Anki

Anki

Intelligent spaced repetition flashcard app — makes learning stick

DeveloperAnkitects Pty Ltd
LicenseAGPL-3.0
PlatformWindows / macOS / Linux / iOS / Android
Version25.09
PriceFree (Desktop) / Paid (iOS)

Features

FSRS-5 algorithm: science-backed optimal review timingCross-platform sync: free AnkiWeb synchronizationRich media support: audio, images, video, LaTeX equationsHandles 100K+ cards: no performance issues at scaleActive plugin ecosystem: extend functionality with add-onsCustom card templates: flexible design options

Alternatives

Anki: Making Memory a Choice, Not Chance

Anki: Making Memory a Choice, Not Chance

Have you ever spent hours memorizing something, only to forget it days later? Your memory isn’t weak — your method is. Anki uses science to prove: memory isn’t about luck, it’s about design.

Overview

Anki is an intelligent flashcard program based on the Spaced Repetition principle, developed by Ankitects Pty Ltd. Its core philosophy is elegantly simple: review just before you’re about to forget, not when you still remember.

Spaced repetition is backed by the “forgetting curve” — information is forgotten fastest right after learning, then the rate of forgetting slows. Anki automatically calculates the optimal next review time based on how easily you recalled each card, keeping your memory in peak condition long-term.

The greatest change users report from Anki: “Memory is no longer a haphazard event, left to chance — it’s now a choice I can control.”

Key Features

🧠 FSRS-5 Algorithm: Smarter Review Scheduling

Anki 25.x introduced FSRS-5 (Free Spaced Repetition Scheduler), the latest advancement in spaced repetition:

  • Higher prediction accuracy: Better estimates of when you’ll forget specific information
  • Personalized parameters: Dynamically adjusts review schedules based on your actual performance
  • Per-deck desired retention: Set different memory retention goals for different decks

FSRS replaces the traditional SM-2 algorithm, achieving higher long-term retention with the same amount of study.

📱 Cross-Platform Sync

Anki offers free AnkiWeb synchronization for seamless switching between devices:

  • Desktop (Windows / macOS / Linux): Completely free
  • Mobile: iOS version requires paid purchase (revenue supports Anki development); Android users can use third-party clients
  • Syncs everything: Cards, review history, and progress — all automatic

🖼️ Rich Media Support

Anki cards aren’t just text — they can embed:

  • Images: PNG, JPG, GIF, and more
  • Audio: Built-in player for audio-based learning
  • Video: Embed video for visual memorization
  • LaTeX: Math equations and scientific notation
  • HTML/CSS: Custom card styling and layout

This makes Anki particularly suitable for language learning, medical studies, programming concepts, and more.

⚡ Handles Large Decks

Anki handles 100,000+ card decks with zero performance issues. Perfect for users who need to memorize large volumes of content — medical students, law students, and professionals alike.

🔌 Active Plugin Ecosystem

Anki has a rich library of add-ons that extend functionality:

  • Advanced Browse / Review: Enhanced card browser
  • Heatmap: Visualize daily review activity
  • Image Occlusion Enhanced: Mask images for memorization
  • MPV Integration: Review within video player

📊 Learning Analytics

Anki provides detailed study statistics:

  • Daily review count: Track your daily progress
  • Retention graphs: Monitor memory health
  • Workload forecast: Predict future review pressure
  • Health check: Evaluate if current settings are optimal

Use Cases

Ideal for Anki

  • Language learners: Vocabulary, grammar, pronunciation
  • Medical / law students: Large volumes of factual content
  • Programmers: Algorithms, commands, APIs
  • Exam preparation: Any long-term memorization needs
  • Anyone wanting to learn more efficiently: Using science-backed methods

Less Ideal

  • Deep conceptual learning: Anki excels at memorization, not understanding
  • Creative content: Knowledge requiring comprehension over memorization
  • One-time short-term memory: Single-use information is inefficient to review

Comparison with Alternatives

Feature Anki SuperMemo Quizlet
Algorithm FSRS-5 (state-of-the-art) SM-18 Basic spaced repetition
Price ✅ Free (desktop) ⚠️ Paid ⚠️ Partial free
Cross-platform sync ✅ Free ⚠️ Paid ⚠️ Premium paid
Media support ✅ Rich ✅ Rich ⚠️ Limited
Plugin ecosystem ✅ Active ⚠️ Moderate ❌ None
Open source ✅ Yes ❌ No ❌ No
Learning curve ⚠️ Moderate ❌ Steep ✅ Low
Card limits ✅ Unlimited ✅ Unlimited ⚠️ Free tier limits
Platforms All major PC-focused Web + mobile

Conclusion

Anki stands out among learning tools because it does something hard: turns memory into a controllable skill instead of a lottery.

If you need to retain large amounts of information long-term — whether languages, medicine, or programming — Anki is the most worthwhile tool to invest time learning. The initial learning curve is low, but the long-term gains are enormous.

Remember: After one week with Anki, you may feel unimpressed. After one year, you’ll be amazed at how much you’ve retained.