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KBruchKhan Academy
Free

Free and open source under the GPL-2.0-or-later licence.

 Free

Free to use, funded by donations to the nonprofit.

Windows, macOS, Linux Android, Web
  • Five exercise types covering fractions, factorisation and percentages
  • Checks answers and gives immediate feedback
  • Free lessons and practice across many subjects
  • Tools for teachers to assign work and track progress
  • Narrow scope limited to fractions and percentages
  • Plain interface aimed at school-age learners
  • Signing up is needed to track progress
  • Follows a mostly school-style curriculum
Downloadable app Downloadable app, Web application
Open source Closed source
License: GPL-2.0-or-later License not stated
No account needed Not stated if an account is needed
Not stated if it works offline Not stated if it works offline

Checked October 1, 2026

Checked September 23, 2026

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