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Fotema vs gThumb: catalog facts
Fotema	gThumb
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the GPL version 2 or later.
Linux	Linux
Dedicated photo gallery for the Linux desktop Easy installation from Flathub	Native GNOME desktop application Works on local folders without a server
Linux only Project website gives little detail about features	Linux only No cloud sync or phone backup
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-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 October 1, 2026	Official website Full listing and sources Checked September 23, 2026

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