The Health app securely stores your health information from iPhone, iPad, and Apple Watch, as well as from compatible third-party apps and connected devices. You can also manually enter data for body measurements, symptoms, menstrual cycle information, and more.
Siri: On change health data permissions for apps and devices at any time.
You can manually enter data about your menstrual cycles, medications, body measurements, and more.
Add information about your menstrual cycles: By logging menstrual cycle information, you can get period and fertile window predictions. See Share your data in Health on iPad