Apple Plans Sleep Tracking Feature for Future Watch
Apple Inc. Watch Series 4 devices sit on display at an Apple store during its launch in Hong Kong, China. (Photographer: Anthony Kwan/Bloomberg)

Apple Plans Sleep Tracking Feature for Future Watch

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(Bloomberg) -- 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.
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