I'm thinking about purchasing an Apple Watch. I'm interested in the activity measurements. Currently, I'm using my iPhone to count steps etc. When I connect an Apple Watch to my iPhone and the Apple Watch collects step data, is this step data automatically saved to the Health app on my iPhone (or is it only available in the Activity app, like on the Watch)?
As long as you give it permission to access and change data in Health, it's all (steps, walking & running distance, heart rate, active calories, etc.) right there in Health. I know this first-hand, as a proud Apple Watch owner since April 24.