If you’re one of those people who loves to know your altitude, top speed and how far you’ve tracked on the mountain – then you need to check out AlpineReplay. You can compare your time with your friends and overlay your speed, distance and height on an iPhone video of yourself riding. However, AlpineReplay have gone one step further and come up with Trace, a waterproof, shockproof device that tracks your GPRS and uses algorithms to identify landed tricks. The $150,000 project has just been successfully backed through Kickstarter. Pretty clever concept, eh?