Apple Watch tracks the active calories you burn. Active calories are the ones you burn through all kinds of movement, from taking the stairs at work to playing .
1) The resting calorie burn is as close to spot-on as possible (it's within +/- 100 calories for a 24-hour period). 2) The calorie burn for cardio is quite good -- with .
For example, your Apple Watch continually monitors the calories you are burning through movement. If you log a workout using a third-party app like Reps .