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Houdoku vs MComix: catalog facts
Houdoku	MComix
Free Free and open source.	Free Free and open source under the GPL 2.0 licence.
Windows, macOS, Linux	Windows, Linux
Reads local manga files and extension sources Vertical and two-page reading modes	Reads comics straight from CBR, CBZ, CB7 and PDF Manga mode for right-to-left reading
Desktop only, with no mobile app Online sources depend on extensions	No macOS build listed GTK interface looks out of place on Windows
Downloadable app	Downloadable app
Open source	Open source
License: MIT	License: GPL-2.0
No account needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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