Jawbone UP3

A wrist-borne fitness monitor with advanced sleep tracking

Gosh, wrists have been a consistent theme in gadgetry this year. Here’s the peerless Jawbone’s latest wrist-borne wearable device, the third incarnation of its UP fitness monitor. (Don’t panic if you buy this, the UP3, and then hear about a UP4 model – it’s the same thing, but with a US-only American Express payment chip built in.)

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If you’re wondering why you would need another wearable device, the UP3 has a brilliantly useful feature – advanced sleep tracking – and it’s magnificent at it. I could write an entire page on what this shower-proof device does (and Jawbone’s website is excellent on the subject). The headline points, though, are that it tracks your all-important resting heart rate, especially on waking; it then integrates that into a mash-up of health data derived from a triaxis accelerometer, bioimpedance sensors, plus skin and ambient temperature sensors. From this it can detect problems and help you correct them, while also analysing your night, defining periods of light and deep sleep – and REM. Fascinating.

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