Most people right now have no idea what that mysterious new app on their home screen is supposed to do. Even having read all the documentation, I was pretty confused about what was going on.
For a few days I thought the Health app was just totally empty and wasn’t recording any data yet. I thought that it was waiting on a future update and needed yet-unreleased apps in order to start to populate any data.
In its current guise, Health creates such a poor first impression for users. It’s completely blank at first boot, despite collecting walking data, and there’s little indication that the Medical ID should be filled out. It’s a really weird app from Apple, who normally provide some kind of indication of why the app is useful.