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Manuals vs DevDocs: catalog facts
Manuals	DevDocs
Best for: GNOME and GTK developers reading API documentation offline	Best for: Searchable, offline-capable browser for hundreds of API documentation sets
Free Free and open source under the GPL-3.0-or-later licence.	Free The open-source application is available without a license fee.
Linux	Web, Self-hosted
Indexes local devhelp documentation Browse documentation by SDK All 3 strengths for Manuals Indexes local devhelp documentation Browse documentation by SDK Fast free-form search	One search box across every documentation set you enable Works offline once documentation sets are downloaded
Linux only Mainly useful for GTK and GNOME development	Documentation sets lag their upstream sources Only covers the projects the community has packaged
Downloadable app	Web application, Self-hosted
Open source	Open source
License: GPL-3.0-or-later	License: MPL-2.0
No account needed	Not stated if an account is needed
Offline features available	Not stated if it works offline
Official website Full listing and sources Sources for Manuals apps.gnome.org/Manuals Catalog checked October 1, 2026	Official website Full listing and sources Sources for DevDocs devdocs.io github.com/freeCodeCamp/devdocs Catalog checked September 22, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.