In addition to a version number (like 2.0), each build of our apps has a revision number which identifies the exact version of the code it’s built from. When we are doing public or private tests where multiple builds have the same version number, we use the revision number to identify each build.
Launch the app for which you’d like to find the revision number. Once it’s running, click the app name in the menu bar and choose About OmniApp. The revision number is the string that starts with an r, just after the version number.