Firstat Google I/O 2014, Google Fit is finally available for Android users everywhere.
Offered as an Android app, the client tracks a host of user activities, including walking, running, and cycling. Designed to harness the potential of those fancy sensors hidden inside your Android phones, Google Fit can help with setting fitness goals. As Google puts it, as long as you're taking your handset with you they'll be able to track your progress.
In keeping with Google's open spirit, Google Fit plays nicely with apps such as Runtastic, Runkeeper and Strava. Further, it can also integrate with hardware and accessories such as heart rate monitors and Android Wear smartwatches.
Beyond the Android app (for 4.0 Ice Cream Sandwich or later), Google also offers a tablet client and Web interface. All three places, of course, have an easy-to-use interface with inviting colors and graphics.