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Apple Books vs Readest: catalog facts
Apple Books	Readest
Free The app is free; ebooks and audiobooks are bought individually with no subscription.	Freemium The app is free and open source under the AGPL. The optional cloud sync service has paid…
macOS, iOS	Windows, macOS, Linux, Android, Web, iOS
Ebooks and audiobooks in a single app Reading position syncs through iCloud	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
Only available on Apple devices Store purchases are tied to Apple's ecosystem	Cloud sync is a hosted service with paid tiers, not purely local A young project, so features and stability are still moving
Downloadable app	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
Not stated if it 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.