Fitness trackers need to provide insights and advice, not just data


Fitness trackers are good at counting things: steps you walked, calories burned, active minutes, how long you slept, and so on. While the accuracy of these devices can be dubious , a tracker can at least tell you how active you are compared to other days—well, assuming you keep wearing it. According to the Journal of the American Medical Association , more than half of the people who purchase …

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