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Houdoku vs Simple Comic: catalog facts
Houdoku	Simple Comic
Free Free and open source.	Free Free, with source code published on GitHub.
Windows, macOS, Linux	macOS
Reads local manga files and extension sources Vertical and two-page reading modes	Minimal native macOS interface Remembers reading sessions
Desktop only, with no mobile app Online sources depend on extensions	macOS only No library management or comic store features
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 October 1, 2026

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