Aerial Companion is the official companion application for the Aerial screen saver for macOS. This utility installs the Aerial screensaver and takes care of automatic updates.
During your first launch, you will be able to set up Aerial Companion to keep you up to date the way that you want. You can choose whether it checks for an update hourly, daily, weekly, or only when you want to update manually. You can run the companion app in the foreground from your menu bar, or in the background without any effort from you.