You're welcome linear2202.
Originally Posted by
malt1977 The activity app does measure active calories, ok, it's not going to be the most accurate reading but it'll do for most of us, if even as a form of motivation to get out and do more.
A recent study by the Cleveland Clinic published in JAMA Cardiology reports that Apple Watch was 90% accurate at measuring heart rate (
read about it here). If the watch can measure heart rate that accurately, it has to be similarly accurate at measuring calories.