Google Fit is Google's new health initiative. It's a service that'll track all your health metrics -- sleep, steps, etc. -- and it's built into the next version of Android. But what does that mean? Well, it means that Google's Android platform is getting the same kind of life-metric tracking that Apple's iOS users are getting in iOS 8 with HealthKit. More importantly, it means that the health devices you're already using will play nice with the myriad Android devices out there. It also means that all your health data ends up in one place, in one app, rather than spread across a variety of software applications. Which app you use, however, is up to you.