Download FATMAP. It uses a combination of 3D, mobile technology and a community of local experts to change the way we go skiing and enable anyone to ski like a local right from Day One. Free version or upgrade to the paid-for pro version.
Download Piste.io. It’s a realistic piste map that you can navigate easily in 3D. Free.
Download 4Riders Ski. Plan routes using a Google Maps-style directions track your position on a 3D map using GPS and find your mates. Free.