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Koodo Reader vs Librum: catalog facts
Koodo Reader	Librum
Free Free and open source under the AGPL-3.0.	Free Free and open source.
Windows, macOS, Linux, Android, iOS, Web	Windows, macOS, Linux
Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud	Reader and library manager in one app Runs on several desktop platforms
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	Sync depends on the project's service Smaller project than established readers like Calibre
Downloadable app, Web application	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-3.0
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 October 2, 2026

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