Head-to-head · Spaced repetition

Anki vs SuperMemo

Anki vs SuperMemo for spaced repetition learning: algorithm differences, ease of use, mobile, pricing. Which flashcard system wins?

Updated May 2026 · 7 min read

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Both implement Piotr Wozniak's SM-class spaced repetition algorithms. Anki is the mainstream + free + community-shared deck answer. SuperMemo is the original + most-refined algorithm but heavier UX. Different audiences.

Option 1

Anki

Free + open + huge community deck library.

Best for

Most learners, language learners, medical students, anyone wanting a no-friction start.

Pros

Free on desktop + Android (iOS $25 one-time)
Massive community decks (medical, language, vocab)
Simple to start
Cross-platform sync
Active development + add-ons

Cons

Algorithm older than SuperMemo's latest (FSRS now closes gap)
iOS app is paid one-time
Mobile UX rougher than apps designed for it

Option 2

SuperMemo

Original spaced repetition; latest algorithm (SM-18).

Best for

Power users wanting maximum algorithmic refinement + incremental reading.

Pros

Most refined algorithm (SM-18 in 2026)
Incremental reading: distill articles into flashcards in-flow
Best for processing books + papers + courses
Strong evidence-based methodology

Cons

Steep learning curve
Windows-first; web version less polished
Smaller community + decks
Subscription pricing $5-15/mo

The verdict

Most people → Anki. The free tier + community decks + cross-platform support cover 95% of needs. Anki's FSRS algorithm closed most of the gap with SuperMemo. Reach for SuperMemo only if you want incremental reading workflow or are deep in spaced-repetition power-user territory.

Frequently asked questions

Cost?

Anki free except $25 one-time iOS app. SuperMemo $5-15/mo.

Best decks?

Anki: AnkiWeb shared decks (Anki Med, Refold language decks). SuperMemo: build your own — community decks weaker.