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YACReader vs Cosmic Comics: catalog facts
YACReader	Cosmic Comics
Free The open-source software is available without a license fee. Hosting, hardware and…	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Linux	Linux
Provides comic-focused reading and library tools.	Handles comics, manga and ebooks in one app Open source under GPL-3.0
Mobile editions and desktop components are separate products.	Official page gives very little feature documentation Linux build is the only one confirmed
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0-only
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 22, 2026	Official website Full listing and sources Checked October 1, 2026

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