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Spruce vs Flatsweep: catalog facts
Spruce	Flatsweep
Free Free and open source under the GPL-3.0-or-later licence.	Free Free and open source under the Mozilla Public License 2.0.
Linux	Linux
Removes unused Flatpak runtimes as well as caches and logs Native GTK and Adwaita interface	Cleans up leftover data from removed Flatpaks Simple single-purpose GTK4 interface
Linux only Small project with a single main developer	Only handles Flatpak leftovers, not other package formats Linux only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0-or-later	License: MPL-2.0
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 October 1, 2026

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