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gThumb vs pwall: catalog facts
gThumb	pwall
Free Free and open source under the GPL version 2 or later.	Free Free and open source under the GPL 2.0 or later.
Linux	Linux
Native GNOME desktop application Works on local folders without a server	Folder tree next to a fast thumbnail wall Handles both photos and videos
Linux only No cloud sync or phone backup	Small project with limited documentation No editing features
Downloadable app	Downloadable app
Open source	Open source
License: GPL-2.0-or-later	License: GPL-2.0-or-later
No account needed	No account needed
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.