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Jawbone Up2

The Jawbone Up2 is a replacement to 2013's Up24: an affordable fitness band that tracks sleep. It's available now for $100 in the US.

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Photo by: Sarah Tew / CNET

Jawbone Up2

The Up2 is slimmer, and has a one-size-fits-all design.

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Photo by: Sarah Tew / CNET

Jawbone Up2

The Up2 tracks steps, activity and sleep, but not heart rate. It has a battery life that lasts 7 days.

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Photo by: Sarah Tew / CNET

Jawbone Up2

The Up2 vibrates and has a few LEDs to let you know it's on, but no display: you have to check your phone for fitness stats and coaching.

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Photo by: Sarah Tew / CNET

Jawbone Up2

It looks good, and pretty low-key. It'll be available in grey and black, for now.

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Photo by: Sarah Tew / CNET

Jawbone Up2

The top metal part of the band activates by tapping it, so you can switch to sleep-tracking mode (it recognizes sleep patterns automatically as you use it).

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Photo by: Sarah Tew / CNET

Jawbone Up3

The Jawbone Up3 looks just like the Up2, and is the same size. But, it tracks heart rate.

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Photo by: Sarah Tew / CNET

Jawbone Up3

It uses bioimpedance to measure heart rate, not LED-based tech like other bands: it can measure temperature and galvanic skin response, too, much like the Basis watches.

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Photo by: Sarah Tew / CNET

Jawbone Up3

A look at the underside of Up3, and its magnetic charging port: it comes with a bendable USB dongle.

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Photo by: Sarah Tew / CNET

Jawbone Up 2015

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Photo by: Sarah Tew / CNET

Jawbone Up3

A new metal clasp adjusts to all wrist sizes, but it's hard to attach easily.

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Photo by: Sarah Tew / CNET

Jawbone Up3

The Up3 will also come in two colors, black and grey. It costs $180, more than the previous Up24.

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Photo by: Sarah Tew / CNET

Jawbone Up3

The Up3 is shower-friendly, but can't be worn while swimming. It lasts 7 days on a battery charge. And its heart rate tracking measures resting heart rate, incorporating the results in sleep analysis.

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Photo by: Sarah Tew / CNET

Jawbone Up3

Can the Jawbone Up3 offer superior heart rate tracking? Stay tuned for a review.

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Photo by: Sarah Tew / CNET

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