Compare software

Manuals vs Zeal: catalog facts
Manuals	Zeal
	Screenshots
Best for: GNOME and GTK developers reading API documentation offline	Best for: Search downloaded programming documentation without going online
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	Windows, Linux
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	Searchable offline documentation collections
Linux only Mainly useful for GTK and GNOME development	Docsets must be downloaded before offline use.
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: GPL-3.0
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 Zeal github.com/zealdocs/zeal Catalog checked September 22, 2026

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

Screenshots