From the very beginning, the Basis Band wanted to do more than the Fitbit and Nike competition. With high-tech sensors designed to monitor your heart rate and sweat levels — not just your flailing arms — it was one of the first, best activity trackers on the market. It was also an ugly little cretin, but the caterpillar is finally coming out of its cocoon: The new $199 Basis Peak brings some smartwatch sensibility to the company's medical-grade formula.
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