Some people might feel a bit wary of sharing personal information with app developers, especially when it’s related to the topic of health. Fortunately Apple has decreed that any app developers that will have access to information collected by the upcoming Health Kit app are forbidden from selling it to advertisers, or any other third party who will use it for profit.
The new policy reads:
“[Developers] must not sell an end-user’s health information collected through the HealthKit API to advertising platforms, data brokers or information resellers.Your application must not access the HealthKit APIs unless it is primarily designed to provide health and/or fitness services, and this usage is clearly evident in your marketing text and user interface. You and your application may not use the HealthKit APIs, or any information obtained through the HealthKit APIs, for any purpose other than providing health and/or fitness services in connection with your application (e.g., not for serving advertising).”
The only exception to this rule is that devs are allowed to share information with medical researchers, but only with the express permission of the user in question. Other than that, the only people who will have access to your medical information will be you, and your doctor.