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Foliate vs FBReader: catalog facts
Foliate	FBReader
Free Free and open source, with no paid edition.	Freemium The reader is free. Some format plugins and premium features are paid.
Linux	Windows, macOS, Linux, Android, iOS
Opens EPUB, Mobipocket, Kindle, FB2, CBZ and PDF Annotations and progress are plain JSON files you can sync however you want	Same library and reading position across desktop and mobile Reads custom OPDS catalogues as well as local files
Linux only; there is no Windows or macOS build Needs recent GTK4, libadwaita and WebKitGTK, which older distributions may not have	Some features and formats need paid add-ons The desktop builds lag the mobile apps
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 22, 2026

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