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why activity trackers could be running out of steps

February 27, 2015

Lark launched in 2010 as a wearables company, with smart wristbands that fed data to fitness- and sleep-coaching apps.

But three years later, Lark changed course and ditched its gadgets on a bold gamble: The ultimate wearable wouldn’t end up being a wearable at all. It would be the smartphone, the increasingly powerful sensor-filled device that millions of people already carry at all times.

Lark’s artificial-intelligence app now coaches people on their fitness and sleeping habits, and it requires nothing but data quietly gathered by a chip inside the iPhone 5s and 6.

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SOURCE:

https://www.buzzfeednews.com/article/stephaniemlee/why-activity-trackers-could-be-running-out-of-steps#.whqkqPKK3