The device consists of a little pod that “plugs” into the band. It needs to be removed for charging, which takes about hours. A full charge is said to last 5 days.
What sets the Fitbit apart from the others is sensory alerts: it has a 5-LED display and a vibration function.
Operation is fairly straightforward and should suit the non-geeky.
To get the full story, see Tested in the July 2014 issue of Popular Mechanics, on sale June 23.
* Lost or damaged your Fitbit charger? Here is how to make a DIY charger – free!