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MangaReader vs Houdoku: catalog facts
MangaReader	Houdoku
Free Free and open source under the GPL-3.0 or later licence.	Free Free and open source.
Linux	Windows, macOS, Linux
Opens image folders and many comic archive formats Folder tree for switching between series	Reads local manga files and extension sources Vertical and two-page reading modes
In maintenance mode, bug fixes only Reads local files only, no online sources	Desktop only, with no mobile app Online sources depend on extensions
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MIT
No account needed	No account needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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