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Warehouse vs Outlet: catalog facts
Warehouse	Outlet
Free Free and open source.	Free Free and open source under the GPL-3.0.
Linux	Linux
Batch actions on many installed Flatpaks Finds and manages app user data, including leftovers	Works on any distribution with libflatpak Distinct interface built with Flutter
Linux only and limited to Flatpak apps Does not manage native distribution packages	Only manages Flatpak applications Small single-developer project with a modest community
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: GPL-3.0
No account needed	No account needed
Works offline	Not stated if it 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.