the Fitbit mobile app
Use your Fitbit to track your session at the skatepark or speeding down the streets. Displays important statistics such as heart rate, current speed, average speed, max speed, distance travelled, and total session duration. All session data is recorded in the Fitbit activity log so you can view the data in the Fitbit mobile app and on Fitbit.com.
This app is open source, please contribute! https://github.com/Fitbit/sdk-exercise