Reader/PhantomPDF provides the following two options to automatically check for updates.
Automatically install updates
With this option checked, the updater will silently complete the available update for your current application.
Automatically download updates, but let me choose when to install them.
With this option checked, the updater will silently download the available greater installer file and pop up a message asking you if you want to install or not.
With one of the automatic update options
enabled, the updater schedules to connect to server for updates every 3
days. To turn on the option, open Foxit application, go to File menu, click Preferences, find Updater, check the option Automatically install updates or Automatically download updates, but let me choose when to install them.
Note: If you have the "Automatically install updates" turned on, but Foxit never updates or detects the updates, you may go to File > Preferences > General > check if you've selected "Disable features that require internet connection". Please uncheck it.