Lets broaden stevejobsfan0123 small and your weird perceptions.
The health app is a reporting device, that displays information collected from activity trackers.
On the iPhone these include functions like the GPS and accelerometer, present in the iPad also.
"Wearable" activity trackers... Polar, Garmin, Fitbit independently collect activity data. Apps like MyFitnessPal and LoseIt collect nutritional and other health data reported in the Health app.
There is no device dependency, the health app should run on the iPad. There should be an OSX version too.
The health app should support Apple's "Continuity" between ios devices. "Handoff let you pick up right where you left off".