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Readest vs EPUBReader: catalog facts
Readest	EPUBReader
Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…	Free Free to install.
Windows, macOS, Linux, Android, Web, iOS	Browser extension
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	Works in Firefox, Chrome, Opera and Edge Opens books in place without copying them
Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving	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 21, 2026	Official website Full listing and sources Checked September 23, 2026

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