Compare software

Readest vs ReadEra: catalog facts
Readest	ReadEra
Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…	Free Free to download and use without ads, according to the developer.
Windows, macOS, Linux, Android, Web, iOS	Android, iOS
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	Opens EPUB, MOBI, PDF, DjVu, Word, FB2 and comic files Reads books directly from ZIP and RAR archives
Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving	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
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.