Compare software

Moon+ ReaderKoodo Reader
Freemium

Free version available, with a paid Pro version.

 Free

Free and open source under the AGPL-3.0.

Android Windows, macOS, Linux, Android, iOS, Web
  • Very wide format support including Markdown and CHM
  • Reads books inside ZIP and RAR archives and OPDS catalogs
  • Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX
  • Syncs through storage you already control rather than a vendor cloud
  • Android only
  • Some features require the paid Pro version
  • It reads DRM-free files only; books bought from a store with DRM will not open
  • Sync depends on whatever storage you configure, so the setup is on you
Downloadable app Downloadable app, Web application
Closed source Open source
License not stated License: AGPL-3.0
Not stated if an account is needed No account needed
Not stated if it works offline Works offline

Checked September 23, 2026

Checked September 20, 2026

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