I have a App called Mud Maps for 4 Wheel Driving in Aust, and i had my iPad Mini connected via hotspot on my iPhone, and it didn't follow along for the ride. I have now just recently bought a Apple approved GPS from Bad Elf and that connects via Bluetooth and works amazingly well.
This usually picks up 11-12 satellites and its accurate to 2 foot or 24" in the old scale
and with its own App or another App i can now use my iPad Mini a Range Finder . . . Im amazed at what i can do, having a dedicated GPS unit connected now, but out bush, ill never be lost or off a track. I can start tracking, then it gives me a 100 hrs of Data, so i can then turn around, and use that data to take me back to where i came from . . But we are getting off track here ~ No pun intended