To help developers get through the iOS 8 app approval process, and to help protect customers from any misuse, accidental or intentional, Apple has updated their App Store Review Guidelines to cover Extensions, HealthKit, HomeKit, Test Flight, and more. The update includes a restriction against storing HealthKit data on iCloud, sharing HealthKit data with third parties without consent, charging for extensions via in-app purchase, and collecting custom keyboard data for anything other than improving the keyboard.
On HealthKit specifically:
Some of the restrictions, like preventing HealthKit data from being stored on iCloud, will help prevent fear, uncertainly, and doubt (FUD) from spreading over things like the security and privacy. Others will no doubt rankle developers who, perhaps, hoped to charge for extensions to help cover the work required to implement them.
Developers are expected to be able to start uploading iOS 8 apps to the App Store sometime after Apple's September 9 event when the gold master build is expected to be released. iOS 8 apps will become available on or around September 17, when iOS 8 is expected to go live for everyone.
Whether you're a developer or a customer, check out the newly updated guidelines and let me know what you think.
Source App Store Review Guidelines