KDE Apps on Flathub
We are building release versions of most KDE applications and distributing them on Flathub.
The "app store" or software center in many distributions (usually Discover on KDE Plasma) is able to install Flatpaks. You can follow the Flathub guide to setup Flatpak and Flathub on your system.
You can then search for a KDE application and it should offer to install the Flatpak version.
You may also directly open the flatpakrepo file with Discover or your otherwise favorite software center.
Here's how to install a Flatpak application from the terminal:
flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo flatpak install flathub org.kde.okular
Using Flatpak Applications
Once a flatpak package is installed, it can be run with
flatpak run org.kde.okular
and be updated to the latest version with
flatpak update org.kde.okular
Nightly KDE Apps
We are also building "nightly" versions of most KDE applications and distributing them at cdn.kde.org/flatpak. Nightly versions build the latest source code of the application, so expect some unstable development quirks; on the bright side, if you find one, you get to tell the developers so they can fix it!
Every app has it's own flatpak repository usually named <appname>-nightly. For every app there is a flatpakref file (<appid>.flatpakref) which you can easily download and open with your software center for installation.
It is also possible to install the app from the terminal:
flatpak install https://cdn.kde.org/flatpak/org.kde.kalzium.flatpakref