sleep tracking
It provides sleep coaching and a sleep score among other new features.
Despite the large number of commercially available sleep apps, a new systematic review calls for more evaluations to be conducted, and for more uniformity during the design process.
The three-year investigation will use iPhones, Apple Watches and Beddit trackers to monitor sleep, physical activity, heart rate and other daily signs.
New workout modules and automatic handwashing detection were rolled out at Apple's annual developer conference, but no update was offered on contact-tracing efforts.
Both features have already been announced or implemented by some of the company's smartwatch competition.
Founders Fund led the round, which will help the sleep tracking company expand its team and support R&D.
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From the wrist to the finger to the forehead to the bedside, consumer sleep tracking is a booming business.