The Apple Health app was created to help organize your important health information and make it easy to access in a central and secure place. The Health app can incorporate data from tens of thousands of third-party apps that are designed to promote healthier habits — everything from nutrition to meditation to fitness.
For some of the data, like steps and activity minutes, the phone or an Apple Watch will serve as the tracker. For everything else you will need one of the third-party apps connected to Apple Health. Then make sure KrowdFit has permission to read from your Apple Health account. To do this:
Sign into your KrowdFit account from the KrowdFit iOS app. Then navigate to your Profile > Settings > Trackers to "Enable Apple Health" and "Turn On All" Permissions.