This app was created specifically for Ram Promasters 2014-up with the 3.6 gas engine. Requires a specific (but affordable) OBD dongle that plugs into your OBD port. It reads codes and provides important gauges, including an all important transmission fluid temp gauge. Learn everything about the Promasters Only app here:

Android Version of ProMasters Only Phone App NOW Available. The Kip-Application! Gauges!Code Reader
https://youtu.be/30pH56_Z2Y4