flatpak list                          # List all installed the Flatpak applications
flatpak run <APPLICATION>             # Launch an <APPLICATION>   
flatpak uninstall <APPLICATION>       # Remove a installed <APPLICATION>
flatpak update                        # Update all your installed applications
flatpak update <APPLICATION>          # Update a individual <APPLICATION>
flatpak remote-list                   # List remote configured Repositories
flatpak remote-ls --app <REPOSITORY>  # List apps of a <REPOSITORY>
flatpak remote-delete <REPOSITORY>    # Remove a <REPOSITORY>
[...]