How the Apple Watch tracks sleep — and why


Apple’s VP of Technology, Kevin Lynch, who has worked on the Apple Watch from the beginning, says that sleep has been part of the plan since the watch debuted five years ago. The company’s been researching sleep tech for years, running private sleep studies and using EEGs to measure sleep against what a device like the Apple Watch can record. Lynch has a unique perspective on why other features, like estimated sleep scores, aren’t being presented for now.

In a conversation with CNET during WWDC, he shared some thoughts on why Apple’s sleep tech is what it is.

So many people want to see this feature in their Apple Watch.