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Koodo Reader vs crqt-ng: catalog facts
Koodo Reader	crqt-ng
Free Free and open source under the AGPL-3.0.	Free Free and open source under the GNU GPL version 2 or later.
Windows, macOS, Linux, Android, iOS, Web	Linux
Over fifteen formats including EPUB, PDF, MOBI, AZW3, comic archives and DOCX Syncs through storage you already control rather than a vendor cloud	Supports a broad range of ebook formats Can open books from ZIP archives
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	DRM-protected EPUB and MOBI are not supported
Downloadable app, Web application	Downloadable app
Open source	Open source
License: AGPL-3.0	License: GPL-2.0-or-later
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 8, 2026

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