Google did some talking about the upcoming Google Fit service during Google I/O a few months back. Google Fit is your all-inclusive fitness tracking app from Google that gives you access to your running, walking and  cycling data quickly and easily. All you need is the app on your phone and your phone in your pocket. Of course the Fit app is also compatible with all Android Wear devices and the Fit API has been finding its way into other wearables and apps as well.
The new Google Fit app is free and can be installed across all your Android devices so you can easily view and track your progress everywhere. There is even a web portal to keep tabs on things and adjust your goal, height, weight ect. Once you start getting your tracking in order and get moving, the Fit app will track it all and display it in easy to understand graphs and images.