While a plethora of gadgets and apps are available to the likes of runners and cyclists to track their activity and progress, these types of tools have been completely absent from the action sports world. Enter ActiveReplay and the TRACE monitor. Described as “the most advanced activity monitor for action sports,” the design uses both inertial sensors and GPS to give users a detailed information on each and every session. Using surf-, skate-, and snow-specific apps for iOS and Android, it can track everything from wave height, speed, and how cleanly you’re landing your tricks to calories burned, distance covered and more. Check out a video breakdown of TRACE  head over to Kickstarter for full details and to contribute to the campaign.