Follow these simple steps to start using Flatpak
Flatpak can be installed on Leap 42.1, Leap 42.2 and Tumbleweed using a 1-click install.
On Tumbleweed, Flatpak can also be installed using Zypper:
$ sudo zypper install flatpak
Flathub is the best place to get Flatpak apps. To enable it, run:
$ flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
To complete setup, restart your system. Now all you have to do is install some apps!
Note: Flatpak applications can only be installed using the graphical Software application on either Tumbleweed or Leap 15.0 and later.