Look on the belt or wrist of just about any well-equipped geek these days and chances are good that you'll see some sort of activity tracker. Whether it's a Fitbit (US$60 - 100), Nike+ FuelBand ($150) , Jawbone UP ($130), or even just a cheesy USB-equipped pedometer, these devices are becoming ubiquitous among those who want to try to keep track of their fitness. The latest entry comes from a pioneer in the connected health market, Withings. The Pulse (US$99.99) joins a line
