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Iris Gallery vs Wolf Gallery: catalog facts
Iris Gallery	Wolf Gallery
Free Free and open source under the Apache-2.0 licence.	Free Free and open source under the GPL-3.0 licence.
Android	Android
No internet permission at all Live detection of new photos and downloads	Every file stored encrypted in private app storage Works offline
Android only Local viewer with no cloud backup or sync	Android only Files live inside the app, so other galleries cannot see them
Downloadable app	Downloadable app
Open source	Open source
License: Apache-2.0	License: GPL-3.0-only
No account needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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