Apple Plans Sleep Tracking Feature for Future Watch

Apple Inc. is said to be testing a sleep monitor for a future version of its smartwatch, a feature that would bolster the company in the health- and fitness-tracking market.

The company has been using the sleep-tracking feature for several months with testers at secret sites around its Cupertino, California, headquarters, according to people familiar with the work. If the functionality is successful in the testing stages, the company plans to add it to the Apple Watch by 2020, according to one of the people. The company has released new versions of the Apple Watch each fall since 2016.

Sleep tracking on the Apple Watch would reduce a competitive advantage that longtime fitness-wearable developer Fitbit Inc. has had on the market. Besides Fitbit, Withings, formally known as Nokia Health, also makes sleep-tracking gadgets.

A new Apple Watch wouldn’t be the iPhone maker’s first foray into sleep-tracking hardware. In May 2017, Apple acquired Finnish startup Beddit, which makes a sleep-tracking sensor strip. Apple sells the product on its website under the Beddit brand and launched an updated version at the end of last year.

Apple hasn’t disclosed how many Apple Watches have been sold, but Strategy Analytics estimated the company shipped 4.5 million units in the third quarter, accounting for 45 percent of the market. The analyst firm said Apple lost some share last year to Fitbit. Global smartwatch shipments are estimated to increase 40 percent in 2019 to 74.1 million units, Gartner Inc. said in a November report.

Before Apple launches new health- and fitness-related features for the Watch, it puts the functionality through rigorous testing at labs around its campus. The company also conducts in-house testing for new sensors on exercise equipment such as treadmills and bikes and has analyzed the Watch’s swim-tracking feature with testers at on-site swimming pools. The company also has testing chambers to mimic outside weather conditions and monitor users’ breathing and perspiration.

Some options may include Apple increasing the Watch’s battery life or creating a way to run sleep tracking overnight as part of a low-power mode. It could also just require a battery charge in the morning.

Apple’s Health application on iPhones has included a tab for sleep analysis data since its introduction in 2014. Currently, hours slept data is provided by the alarm clock function in the iPhone’s Clock app. The app also can pull in data from third-party sleep monitors.

Fitbit’s sleep-tracking feature uses a heart-rate monitor and other sensors to determine when a user falls asleep, how long they are sleeping, and the quality of their sleep. It can differentiate between light, deep and REM sleep, according to the company’s website.

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