I had a pleasant surprise yesterday. I was away from home for to take some pictures with the P3P. I use a Ipad mini2 Ret cellular, but I don't have a internet connection. But to my joy when I opened the pilot app. the map and the place where I was, were projected! Today I tried this on some other locations with the same result. So you don't need a internet connection or to cache maps if you have a cellular Ipad.