Have you ever tried to get the version number of your app developed in PowerApps to display in your app?
This version number helps you check that your user is running the right version of your app.
With the following expression you can get the version number of your existing app.
In my case my app is call version and the following expression is used to get the number:
CountRows(PowerAppsforAppMakers.GetAppVersions(First(Filter(PowerAppsforAppMakers.GetApps().value,properties.displayName = "version")).name).value)