Fitness Tracking on Your Ankle Flyfit isn't all that different from other pedometer-based fitness trackers –– except you put it on your ankle instead of your wrist.
That's useful for swimmers and cyclists, who didn't get any joy out of the Fitbit, Nike Fuel Band or Jawbone Up. But Flyfit can measure pedal and leg stroke movements.
Flyfit, a Kickstarter project, has been in development since 2012. Like most fitness trackers, it will still record other aspects of your daily activity — your steps, your sleep cycle. It will also connect with your phone via Bluetooth, allowing the device to track pace, speed and your GPS position, all in real time.
The device includes a waterproof, USB-chargeable battery and five different band colors. The battery can last a week in low-power mode. The app, still in development, will be available for both iOS and Android.
Source: http://mashable.com/2014/02/20/flyfit-fitness-tracker/