⌚️ Apple Watch misleads users about calories burned
π° The frequency of errors in calorie counting averages 28%, and sometimes reaches even 80%.
π The gadget also unreliably tracks sleep, especially falling asleep and waking up, as trackers rely on heart rate and movement rather than brain activity.
π♂️ The researchers had no issues with heart rate and step tracking. For fitness watches, the margin of error is insignificant (4% and 8%).
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