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Librum vs Foliate: catalog facts
Librum	Foliate
Free Free and open source.	Free Free and open source, with no paid edition.
Windows, macOS, Linux	Linux
Reader and library manager in one app Runs on several desktop platforms	Opens EPUB, Mobipocket, Kindle, FB2, CBZ and PDF Annotations and progress are plain JSON files you can sync however you want
Sync depends on the project's service Smaller project than established readers like Calibre	Linux only; there is no Windows or macOS build Needs recent GTK4, libadwaita and WebKitGTK, which older distributions may not have
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-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 October 2, 2026	Official website Full listing and sources Checked September 20, 2026

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