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Koodo ReaderReadEra
Free

Free and open source under the AGPL-3.0.

 Free

Free to download and use without ads, according to the developer.

Windows, macOS, Linux, Android, iOS, Web Android, iOS
  • Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX
  • Syncs through storage you already control rather than a vendor cloud
  • Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files
  • Reads books directly from ZIP and RAR archives
  • 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
  • Closed source
  • Mobile only, with no desktop version
Downloadable app, Web application Downloadable app
Open source Closed source
License: AGPL-3.0 License not stated
No account needed No 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.