AlpineReplay is described as 'gives skiers and snowboarders ultimate bragging rights. We measure speed, airtime, vertical, Calories and more with an iPhone or Android and let you compare and compete with friends'. There are four alternatives to AlpineReplay for a variety of platforms, including iPhone, Windows Phone, Android, Android Tablet and Apple Watch. The best alternative is Skied Demon. It's not free, so if you're looking for a free alternative, you could try Ski Blackbox or Slopes.
Slopes is the best way to accurately track and show off days skiing and snowboarding with just your phone’s GPS. Slopes automatically detects lifts and runs, reporting statistics in real-time on the iPhone, Pebble watches, and now on Apple Watch.