The Fitbit Flex has officially gone on sale for $100 online and in U.S. retail stores. We saw the “OG fitness-tracking dongle” at CES earlier this year, where it was clear that Fitbit was trying to steal the mojo from competitors like Nike’s Fuelband and the Jawbone Up. Now the Flex is out in the wild, and users can be the judge.
Bluetooth 4.0 is used to connect the silicon wristband to an Android device or iPhone. It does everything the typical fitness tracker accomplishes: counts calories and steps, monitors sleeping, and lets you share stats with friends to keep you motivated. The actual exercise is still on you, though..