At the CES event in Las Vegas this week, Fitbit unveiled a new Bluetooth Smart-enabled, wrist-worn activity tracker, called Fitbit Flex. Like most of Fitbit's other trackers, the Flex also promises to ...

San Francisco-based Fitbit has commercially launched its first wristworn activity and sleep tracking device, Fitbit Flex, which it first announced at the Consumer Electronics Show in January. Fitbit ...

Remember Jawbone? One of my first wearables was the UP2, a fashionable bangle-like fitness tracker that provided basic sleep tracking. I fell in love with its slim, unassuming form factor. A ...

Meet Fitbit's next Fitbits. The fitness-tracker company is unveiling two new devices today, the $150 Charge 2 with heart rate monitoring and a larger screen, and the smaller, "swim-proof" $100 Flex 2 ...