Compare software

repeaterSuperMemo
Free

Free and open source under the Apache-2.0 license.

 Paid

SuperMemo 19 for Windows costs $34 USD.

Windows, macOS, Linux, Command line Windows
  • Keeps flashcards in plain Markdown files
  • Uses FSRS to schedule reviews
  • Spaced repetition with incremental learning of articles and texts
  • One-time price for the Windows program
  • Uses a terminal interface
  • Does not include a card editor or sync layer
  • Windows only
  • Paid software
Downloadable app Downloadable app
Open source Closed source
License: Apache-2.0 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 October 8, 2026

Checked September 23, 2026

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