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Koodo ReaderBookFusion
Free

Free and open source under the AGPL-3.0.

 Freemium

Free account to get started, with paid plans for more.

Windows, macOS, Linux, Android, iOS, Web Android, Web, Browser extension
  • Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX
  • Syncs through storage you already control rather than a vendor cloud
  • Syncs reading position across devices
  • Reads both EPUB and PDF
  • 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
  • Books are stored in a hosted cloud service
  • Requires an account
Downloadable app, Web application Downloadable app, Web application, Hosted service, Browser extension
Open source Closed source
License: AGPL-3.0 License not stated
No account needed Account needed
Works offline Not stated if it works offline

Checked September 20, 2026

Checked September 23, 2026

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