If you're lost on a trail or searching for the bathroom, RealSki will set you right.
The iPhone app overlays trail map markers, lift areas, and lodges when you hold the phone's camera in front of you. Move it up, down, left, right, and the markers move with it.
It works at more than 80 mountains in North America.
Cost: The app is free, but each resort map costs 99¢ on iTunes.
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