If you didn't use jade_gui to install crystal or selected not to install it, you can set Flatpak up by using the following steps.
To install Flatpak in Crystal Linux, you must first make sure your packages are up to date. Run the following in a terminal:
ame upgThen install Flatpak:
ame ins flatpakFlathub is the best place to get Flatpak apps. To enable it, run:
flatpak remote-add --if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepoTo complete setup, restart your system. Now all you have to do is install apps!