Apple’s announcement of the new Apple Watch Series 12 includes references to some notable Apple Intelligence upgrades to Health features, but the iPhone and iPad also benefit in some big ways.

New Health features come to iPhone as well as Apple Watch
The Apple Watch Series 12 unveiling saw Apple focus on its ability to monitor the wearer’s heart rate, heart rate variability (HRV,) and more. But it’s what Apple intends to do with the data the Apple Watch collects that will make the biggest difference to people’s lives.
Between a newly redesigned Health app on the iPhone and iPad and a new Readiness feature that uses data from multiple sources, Apple just revamped the way it interprets the data it collects. As a result, it also revamped how people will be able to make use of it.