Use of android phone instead of dedicated scan gauge II

IMO, the Torque app is not really a replacement for Scanguage II fuctionality. I've found Torque to be limited based on the vehicle being used - not all functions are available. It's not really orientated for RV use anyway. In my case, MPG readouts were not working at all with mine. Have even posted on their forums, but no clear answer from the developer.

I'd would just try Torque and see if it works with your setup, and gives you the readouts important to you. Free to try.