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