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Koodo Reader vs EPUBReader: catalog facts
Koodo Reader	EPUBReader
Free Free and open source under the AGPL-3.0.	Free Free to install.
Windows, macOS, Linux, Android, iOS, 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	Works in Firefox, Chrome, Opera and Edge Opens books in place without copying them
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	Does not open DRM-protected ebooks Read-aloud needs a separate extension
Downloadable app, Web application	Browser extension
Open source	Closed source
License: AGPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 23, 2026

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