We should call them ‘life tracking bracelets’. These new devices, are becoming more popular (Up by Jawbone, Fitbit Tracker)… and powerful than ever. The Basis Health and Wellness Tracker ($199) tracks your calories burned, daily activity, stress, sleep patterns and other physiological metrics. There is also of course a social component to the Basis. It comes with an interface that gathers all the data collected by the wrist device and identifies characteristic behaviors in your daily activity.