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Foliate vs Koodo Reader: catalog facts
Foliate	Koodo Reader
Free Free and open source, with no paid edition.	Free Free and open source under the AGPL-3.0.
Linux	Windows, macOS, Linux, Android, iOS, Web
Opens EPUB, Mobipocket, Kindle, FB2, CBZ and PDF Annotations and progress are plain JSON files you can sync however you want	Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud
Linux only; there is no Windows or macOS build Needs recent GTK4, libadwaita and WebKitGTK, which older distributions may not have	It reads DRM-free files only; books bought from a store with DRM will not open Sync depends on whatever storage you configure, so the setup is on you
Downloadable app	Downloadable app, Web application
Open source	Open source
License: GPL-3.0	License: AGPL-3.0
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 20, 2026	Official website Full listing and sources Checked September 20, 2026

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