Quickly see info for installed Flatpak apps and runtimes (runtimes are hidden by default, but there’s a toggle to display them). It displays the same detail as the flatpak list command but in a GUI, and includes buttons to copy each snippet to your clipboard – handy!
Warehouse lets you clear user and app data for installed Flatpak(s) without having to remove them, which can be a handy way of ‘resetting’ an app back to its defaults.
The app is also able to scan for data left from previously uninstalled Flatpak apps.
So not exactly an all-in-one Flatpak management tool, but it has some quite useful features, making it worth installing. It is especially useful for doing some clean-ups and finding where the user data is stored. It also helped me identify some End-Of-Life Flatpak apps that I still had installed.
See https://www.omgubuntu.co.uk/2023/10/warehouse-flatpak-tool-for-linux