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Houdoku vs CDisplayEx: catalog facts
Houdoku	CDisplayEx
Free Free and open source.	Free The desktop reader is offered as a free download.
Windows, macOS, Linux	Windows
Reads local manga files and extension sources Vertical and two-page reading modes	Opens CBR, CBZ and PDF comics Manga support
Desktop only, with no mobile app Online sources depend on extensions	Closed source Reader rather than a full library manager
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
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.