I have an iPad Air, new to me, I installed my sky walk app that is supposed to orient to the current sky by holding up the iPad and moving it around, it finds and identifies the planets and constellations currently in view, I am guessing it uses a compass function. Unfortunately, it worked great on my iPad 2, but will not work on the new I paid air, using iOS 9.2.1. When I try to use the app, it is either static or it spins out of control like it is trying to orient itself but it never does. It is not the app, I tried loading a basic compass app to see what it would do, it never finds north, just keeps going round and round. Once in a while the calibration screen pops up, but the ball won't finish going around the circle to finish the calibration. I have tried every thing I can think of, uninstalling the app, shutting the iPad off, reinstalling the app, still will not work right. Any ideas?