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Readest vs Adobe Digital Editions: catalog facts
Readest	Adobe Digital Editions
Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…	Free Free to download.
Windows, macOS, Linux, Android, Web, iOS	Windows, macOS, 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	EPUB 3 support including audio, video and right-to-left text Books appear across all devices with ADE
Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving	Closed source Reading features are basic compared with dedicated library managers
Downloadable app, Web application	Downloadable app
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.