The instructions here describe how to create systemd service and timers to automate updating both user and system Flatpak installations. The system systemd units will only update the system Flatpaks, whereas the user systemd units will update both the user’s Flatpaks and the system’s. In most cases, having both user and system services to update Flatpaks is unnecessary. The system systemd units are handy for the default Flatpak behavior, which installs Flatpaks system-wide. The user systemd units are great for users who opt to install Flatpaks in their user-specific installation, such as Flatpak developers.