Ditch the Fitbit - track fitness with your phone.

The article looks at a smartphone fitness tracking system developed by researcher Amit Pande and team, which uses activity tracking algorithm for neural network processing of data from the smartphone accelerometer and barometer and user data such as gender, height, and weight to calculate exercise energy expenditure. The system was tested against a calorimeter and the commercial fitness tracking products Fitbit and Fuelband by sporting goods company Nike on exercises such as stair climbing.