Compare software

AlgoAppAnkiDroid
Freemium

Free to start, with paid options.

 Free

Free and open source.

Windows, macOS, Android, iOS, Web Android
  • FSRS spaced repetition scheduling
  • Creates cards from PDFs, photos, prompts and CSV files
  • Spaced-repetition scheduling for efficient review
  • Compatible with Anki decks
  • Closed source
  • Details of the paid tier are not shown on the homepage
  • Android only
  • Syncing with other devices depends on a separate Anki sync service
Downloadable app, Web application Downloadable app
Closed source Open source
License not stated License: GPL-3.0
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 2, 2026

Checked September 24, 2026

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