The SDK includes three sets of As for developers, as detailed in the Developers blog: th the onslaught of fitness apps taking over the ay Store, companies like Samsung making its own health app a marquee feature on its flagship devices, had to conjure up something of its own. The Fit service will work with various fitness apps wearables to store their data locally in the cloud, allow fitness apps to share their data with each other. The SDK is compatible with the new Android preview for the Nexus 5 second-generation Nexus 7. You can read more about it at the Developer eview page.