I went to an apple store and tried to get info on how the calorie tracker in conjunction with the exercise app works. No one knew the answers to my questions. I went to another store. Same result. I went to another store and tried to find out about what turns the heart beat sensor on and off. No one could answer my questions. Why are apple employees not fully trained to answer questions like they are on the other apple products? Wouldn't it have been wise for apple to have a couple training seminars for their employees before they released the watch?