Most of the fitness gadgets cannot be used in extreme sports. For example, if you wanted to go surfing or skateboarding, no gadget is equipped enough to stand those conditions. But this is Trace, which is meant to be used in the extreme action sports.
How trace works are mounted on the board which you are using. It will then record the height if you are skateboarding, or maybe record the speed if you are surfing. It then syncs all your data to a smartphone. The app also allows you to see other people’s records thus keeping it competitive.