Along with all the other new features and enhancements coming to iOS 8, we got out first look at HealthKit. HealthKit provides a single place for all of your health-conscious devices ? like a fitness tracker or heart monitor ? to sync their data so it's available for apps to use. You'll have complete control over how your data is exposed and which apps have access (and vice-versa) for a fine-tuned experience that should provide exactly what you need, where and how you need it.
Full story from the iMore Blog...