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FBReader vs Apple Books: catalog facts
FBReader	Apple Books
Freemium The reader is free. Some format plugins and premium features are paid.	Free The app is free; ebooks and audiobooks are bought individually with no subscription.
Windows, macOS, Linux, Android, iOS	macOS, iOS
Same library and reading position across desktop and mobile Reads custom OPDS catalogues as well as local files	Ebooks and audiobooks in a single app Reading position syncs through iCloud
Some features and formats need paid add-ons The desktop builds lag the mobile apps	Only available on Apple devices Store purchases are tied to Apple's ecosystem
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked September 23, 2026

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