Apple’s Health app is asking users to send their data to a reporting program which will use the information to improve the company’s health-related offerings. If a user opts in, Apple will gain access to workout and activity information from their iPhone and Apple Watch, which the company says will be used to “understand the effectiveness of health and fitness features on Apple devices.” Apple claims the data won’t be used for any other purpose and that it won’t include any personally identifiable information. The company will also gather some location data and information about what other fitness apps are installed on a user’s devices.