ResearchKit is a powerful tool that helps medical researchers gather health data from many iPhone users. You can take part and allow your data to be used in meaningful studies. And CareKit helps you take an active role in managing your own health, giving you tools to track things like your symptoms and medications, then share that information with your care team.
Health, as defined by the World Health Organization (WHO), is "a state of complete physical, mental and social well-being and not merely the absence of disease or infirmity." This definition has been subject to controversy, as it may have limited value for implementation. Health may be defined as the ability to adapt and manage physical, mental and social challenges throughout life.