Why this works isn’t entirely clear, but presumably it forces the App Store to rescan for available updates for the apps that are currently installed.
Find “Date & Time” and turn ‘Set Automatically’ to OFF.Go to the Settings app and then to “General”.We say sometimes because this doesn’t always work, but it’s easy so you may as well try it: Sometimes sending the date into the distant future and then setting it back will cause the App Store Updates section to refresh. Solution 1: Change the Date & Time to Trigger App Store Updates Refresh If you run into an empty Updates section of the App Store despite knowing with certainty that updates are available to your installed apps, try one of the two following solutions to resolve the problem and to download the newest versions of the apps in question.