I fly my P3A using a wi-fi only iPad Mini 2. Somehow Autopilot seems to think my iPad is a few hundred feet from where it actually is. Do you have the same problem? Do maybe my iPad doesn't have a GPS? UPDATE: I found this article, and am reading it... ADD GPS TO YOUR iPAD 2 WiFi Now that I've skimmed through some material on add-on GPS devices, I learned that some such devices just aren't compatible with certain application programs. How would I know which device to get? Do you have any experience with such devices, or do you know of a better solution? Somewhere in the house I have an old Garmin GPS receiver for Windows that plugs into a standard USB port, but I don't even know if that could be made to work with a modern iPad.