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Photo Supreme vs KPhotoAlbum: catalog facts
Photo Supreme	KPhotoAlbum
Paid Paid software with a 30-day free trial and no credit card required.	Free Free KDE community software.
Windows, macOS, Linux	Linux
Handles very large catalogs Keeps your existing folders and metadata	Fast tagging workflow for large batches of photos Searches combine people, places and custom categories
Paid after the 30-day trial Focused on cataloging rather than editing	Organizes photos rather than editing them Tagging a large archive still takes up-front effort
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 24, 2026

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