"Why not use my phone?"

Batteries die. Phones get dropped off of lifts. Fingers get frostbite. Need more reasons? Ok, well, you can drop your phone just like you can drop anything else. And it's a lot worse if your little precious drops off a lift. They're also not that durable, and odds are your phone still isn't water resistant. Hit an ArmMap with a rock and then hit your iPhone and tell us how it goes. (Please don't actually do this, we know what happens and it's going to involve a new phone.)

Don't use your phone for a ski map. And don't get me started on your precious Watch...