KitKat brought pedometer functions to Android, but that's not necessarily enough for smartphone owners who want to track their fitness routines. Google may be aware of that desire for more athletic info, though. Google Operating System has discovered code (shown below) for a future "Fitness API" that would supply apps with activity data from an Android device's sensors. We don't know much more than that, however. There aren't any clues as to when (or if) the API would be ready, and it's uncertain whether the software is tied to either a new OS revision or a Google Play Services update. Still, don't be surprised if your favorite Android fitness app becomes much more sophisticated in the near future.