Compare software

KnowtSuperMemo
Free

Flashcards and learn mode are free to use.

 Paid

SuperMemo 19 for Windows costs $34 USD.

Android, iOS, Web Windows
  • Free flashcards with unlimited learn mode
  • Generates study material from PDFs, videos and lectures
  • Spaced repetition with incremental learning of articles and texts
  • One-time price for the Windows program
  • AI features send your material to Knowt's servers
  • Aimed mainly at school and college students
  • Windows only
  • Paid software
Downloadable app, Web application Downloadable app
Closed source Closed source
License not stated License not stated
Not stated if an account is needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked September 24, 2026

Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.