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Why Activity Trackers Could Be Running Out Of Steps
A tiny chip in the iPhone automatically and accurately tracks your fitness -- no wearable needed. That could mean trouble for Fitbit and Jawbone. View this image › Fitness trackers (from left): Basis Peak, Adidas Fit Smart, Fitbit Charge, Sony SmartBand, and Jawbone Move, are posed for a photo next to an iPhone, Monday, Dec.…