Enabling a Mobile Application to Access Apple Health Data

This article pertains to: Legacy API (V1) Inform (v2)

Do I need to enable a third party app to access the Apple HealthKit data on my iPhone?

Yes. There is a permission process for apps that connect to Apple Health that will enable the app to have read and/or write access to HealthKit data. The process will begin in the iPhone app itself and will be viewable on the Apple Health "Sources" page. The Apple Health app will also allow you enable or disable a specific app's read or write permissions.

Apple Health Settings -> Privacy -> Health Example: