Can't get FreedomPop app on Android 4.1.2
I've been using the service for a long time using my Android 4.1.2 phone. The phone became very cranky and I couldn't fix it so I decided to reset it to factory settings. That fixed the crankiness but I can't now install the FreedomPop app because Google Play says that it is incompatible with my Android version. I assume that the app has been updated to the point that it won't work with my OS. Can I get hold of an older version that will work? I am happy installing APK files.