Jawbone Up3

Multi-function fitness sensor band

Before the Apple Watch and its fancy health apps came along, lots of people were already wearing futuristic gadgets around their wrists. The Jawbone Up dates back to 2011, and this latest model doesn’t run apps or tell you the time, but does measure your skin temperature, respiration, heart rate, movements and heat flux – or how fast you’re losing energy (perhaps a polite way of saying how much you’re sweating).

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