I recently downloaded the CoPilot GPS App, you can enter the RV height and it will run off the phone's GPS if wanted/needed to save data usage or if no signal. The downside is it loads maps in your phone so you will need some memory space for the maps. I have not used it yet with my TT just testing in normal driving and it seems OK so far.
2016 Windjammer 3006WK
2010 Dodge Ram 2500, 4x4, Diesel, Front Hitch, Air Lift 5000 Rear Air Bags.
Equalizer E4 1.4k/14k WD Hitch.
TST 507 TPMS
Furrion FOS48TA Observation Camera
Garmin RV-760 GPS