Spaced Repetition · SM-2 Algorithm · Free

Remember everything you study.
Forever.

The SM-2 spaced repetition algorithm schedules your flashcard reviews at the exact optimal interval — maximizing long-term retention while minimizing review time. The same algorithm as Anki. Free.

Download Free — App Store Google Play
How It Works

Up and running in 3 steps

No setup, no complex configuration. Open the app and start.

1
Generate or create your flashcard deck
Use the AI Flashcard Generator (30 seconds from any notes or PDF) or create cards manually. Your deck is instantly enrolled in SM-2 scheduling.
2
Start your first review session
Review each card and rate how well you remembered it (Again / Hard / Good / Easy). SM-2 records your rating and calculates the next review interval.
3
Follow your daily review schedule
Naukado shows you exactly which cards to review each day. Cards you know well appear weeks or months later; difficult cards appear tomorrow. Review only what you need to — nothing more.
Why Naukado

Built for real studying

Every decision was made to help you learn better and faster.

🧠
Proven by decades of research
The SM-2 algorithm was developed by Dr. Piotr Wozniak in 1987 and has been validated by decades of memory research. It outperforms random review by 200–300% for long-term retention.
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Study less, remember more
SM-2 eliminates over-reviewing. You spend time on what you're about to forget, not what you already know. Studies show 40% time savings with equal or better retention.
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Adapts to your memory
Every student's memory profile is different. SM-2 tracks your individual performance on each card and schedules reviews based on your actual forgetting curve — not a generic schedule.
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Combined with AI generation
Unlike Anki where you spend hours creating cards, Naukado generates them from your notes in 30 seconds. Full SM-2 algorithm + AI creation = the best of both worlds.
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Free — unlike Anki for iOS
Anki for Android is free; Anki for iOS costs $24.99. Naukado is completely free on both iOS and Android, with full SM-2 implementation.
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Works in 10 languages
SM-2 scheduling works equally well regardless of language. Study your Matura notes in Polish, your ENEM content in Portuguese, or your JEE material in Hindi.
Compare

Naukado vs the alternatives

How Naukado stacks up against the most popular alternatives.

FeatureNaukadoQuizletAnkiKnowt
SM-2 algorithmyes ✅ Full SM-2partial ⚠ Simplifiedyes ✅ Full SM-2partial ⚠ Basic
AI card generationyes ✅ Freepartial ⚠ Paidno ❌ Manual onlyyes ✅ Free
iOS costyes ✅ Freeyes ✅ Freeno ❌ $24.99yes ✅ Free
10 languagesyes ✅ Yesyes ✅ Yespartial ⚠ Partialno ❌ English only
8 study toolsyes ✅ Yesno ❌ Flashcards onlyno ❌ Flashcards onlyno ❌ Notes/flashcards
Math solveryes ✅ Yesno ❌ Nono ❌ Nono ❌ No
FAQ

Frequently asked questions

What is the SM-2 spaced repetition algorithm?
SM-2 was developed by Dr. Piotr Wozniak and first published in 1987. It calculates the optimal review interval for each flashcard based on how well you remembered it previously. Cards you find easy are shown weeks or months later; difficult cards return sooner. This matches the natural human forgetting curve, producing significantly better long-term retention than random review.
Is Naukado's spaced repetition the same as Anki's?
Yes. Naukado implements the full SM-2 algorithm — the same core algorithm that Anki is built on. The main difference is that Naukado generates your flashcards automatically using AI, while Anki requires manual card creation.
How is spaced repetition different from just reviewing flashcards?
Random or sequential review wastes time on cards you already know and doesn't reinforce cards you're about to forget. SM-2 specifically targets the card you're most likely to forget next, creating a review schedule that maximizes retention while minimizing time spent reviewing.
Is Naukado's spaced repetition free?
Yes. SM-2 spaced repetition scheduling is fully free in Naukado for all card decks. There's no premium tier required for spaced repetition.
Can I use spaced repetition for any subject?
Yes. SM-2 is subject-agnostic — it works for vocabulary, historical dates, chemistry equations, math formulas, anatomical terms, legal definitions, or any information that can be formatted as question-answer pairs.

Try it free today

Download Naukado and use all 8 AI study tools for free. No subscription required.

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