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ComicReaderUltimate vs CDisplayEx: catalog facts
ComicReaderUltimate	CDisplayEx
Free Free to use; the repository lists a CC-BY-NC-ND-4.0 license, which is not an OSI-approved…	Free The desktop reader is offered as a free download.
Windows, macOS, Linux	Windows
Supports single pages, double pages, and continuous scrolling GPU-accelerated rendering	Opens CBR, CBZ and PDF comics Manga support
Always runs fullscreen and has a limited GUI Does not include a library browser	Closed source Reader rather than a full library manager
Downloadable app	Downloadable app
Closed source	Closed source
License: CC-BY-NC-ND-4.0	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked October 8, 2026	Official website Full listing and sources Checked September 23, 2026

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