![]() Instead, "has been doing our sleep studies internally with thousands of people," Lynch says. No public sleep studies, yetĪpple has public health studies for areas like heart health, hearing and women's health, which are enabled through separate opt-in research apps, it has no public sleep studies yet. You control where it's shared, like with third-party apps connected to HealthKit, and Apple doesn't collect the information. Like other sensitive information collected by Apple devices, stats about your sleep stay on your device. "We treat the data that's being collected on a user's device with a high level of sensitivity around privacy. So we've been working on this for a while," Lynch says. Instead, Apple has been building its machine learning models from data collected through internal studies. "And we've learned a lot about how the main thing here is really about duration."Īpple's not planning to use your sleep dataĬompanies like Fitbit have used anonymized user data for years to study demographic sleep patterns and improve observations on sleep, but Apple doesn't plan to do that. "Even in our studies, we had people wear EEGs on their heads, so we got insight into the electrical activity of their brain, in addition to what we're able to sense on the wrist with Apple Watch," Lynch says. "And we've looked a lot into that."īut Apple's research has found something else is more important: the amount of time you sleep. "Many sleep apps show information about REM cycles and other data like that," Lynch says. That's what Apple's feature aims to help with.Īpple sees the wind down and the bedtime routine as an important part of sleep quality. My 11-year-old son already does things to wind down each night, including meditation, and I should learn from him. Wind Down is an expansion of that feature, and it also connects to helpful apps that could be part of that routine. Even then, I saw it as something that would eventually make sense on the Apple Watch. The iPhone feature lets you set your bedtime and morning alarm times and then tracks whether you use your phone during the downtime. I tried Apple's Bedtime feature on iOS way back in 2016, which was a surprisingly helpful tool to remind me to stick to a good bedtime routine. Sarah Tew/CNET It's about the wind down, not a sleep score Apple's Wind Down feature on the iOS 14 is part of the Apple Watch's sleep experience, too.
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