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Fotema vs Koko: catalog facts
Fotema	Koko
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source, part of KDE.
Linux	Linux
Dedicated photo gallery for the Linux desktop Easy installation from Flathub	Works on desktop and mobile Linux Regular releases with KDE Gear
Linux only Project website gives little detail about features	Linux only Simpler than a full photo manager
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License not stated
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 24, 2026

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