HEALTH KIT
Healthkit is a centralized repository of health and fitness data on iPhone and Apple Watch.
Apple introduced HealthKit with iOS 8 and has been constantly improving it since then. Every smartphone has a pre-installed Health app that tracks the number of steps and sleep duration, collecting statistics. Users also have access to several dozen journals where they can keep track of their health from different angles. With the help of the Healthkit framework, you can set up data exchange between the storage of this information and your application.
iPhone users can use Health for dozens of different purposes. Just in the basic categories, there are trackers for activity, breathing, heart, cycle, hearing, body measurements, nutrition, and common symptoms. You need Healthkit integration if you're developing a diet and workout app, an app for people with specific diseases like asthma or panic attacks, and even an app that helps you concentrate. With the Healthkit API, all the necessary data will be pulled into your app and vice versa.
Healthkit helps people do their favorite activities together. For example, each of them can use the tools built into their smartphone to count steps or any other app for this purpose, and then launch yours to see a summary table of results.
Like all Apple tools, Healthkit guarantees maximum protection of personal data. To use the features of this service, you will need to provide for obtaining permission to use certain information. Healthkit already has ready-made tools for this, so setting up privacy won't take your developers much time, and your users will get the level of personal security they need.
Your app needs HealthKit integration if it is designed to work in conjunction with the Apple Watch or uses only the activity data that the iPhone itself can track. These are primarily sports trackers and medical apps, but also many others, such as those that help you keep your daily schedule.