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EPUBReader vs Readest: catalog facts
EPUBReader	Readest
Free Free to install.	Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…
Browser extension	Windows, macOS, Linux, Android, Web, iOS
Works in Firefox, Chrome, Opera and Edge Opens books in place without copying them	Reads EPUB, PDF, MOBI, AZW3, FB2, CBZ, TXT and Markdown in one app The same reader on macOS, Windows, Linux, Android, iOS and the web
Does not open DRM-protected ebooks Read-aloud needs a separate extension	Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving
Browser extension	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
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 21, 2026

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