Fits And Starts app for iPhone and iPad

Fits & Starts lets you see the high-resolution data recorded in HealthKit during an event from your calendar -- for instance, your heart rate during a stressful meeting with the boss, or your stride rate while walking to lunch.

You can get quick stats like total distance travelled or average stride rate for each event.

You can also dig into the daily data recorded in HealthKit. Just choose a day and a fitness metric you want to explore. The metric you selected will be shown with the events for that day overlaid on top.

Video Preview: http://youtu.be/wHKj-HFAPEs

Note that to see data like heart rate you need a HealthKit compatible heart rate monitor (like some upcoming watch Ive read about) that records its data in the HealthKit.