Fly shows the version of the app in more than one location. If your flying, and go to the settings ellipse, and probably under "About", it shows the App version and if you just open the app before connecting to the AC, you can go to profile - settings and its at the bottom of a menu on the left. This reports a build #, as well, and in some releases of Fly, this number has changed where the version has not.. As I noted, if you really want to get specific, you look for what I assume is a build # on the settings page, not necessarily under the About Menu.