Alongside that original tri-axis accelerometer, the Up 3 features sensors to pick up on the temperature of your skin, the temperature of the world around you, and for bio-impedance, specifically tracking heart rate, respiration, and skin conductivity (Galvanic Skin Response).


And when you pick up the Up 3, you can actually see the differences in the sensor setup, with gold-looking titanium nitride ceramic-like contacts that sit against the skin for measuring these attributes and data points.

Using the Up 3, you’d never realise the tracker is doing anything different, and essentially, this is like using any other Up. You pair it with a Bluetooth LE compatible smartphone — basically, anything from the past year — and then wear the device.

As you wear it, the Up will talk to the phone either at random intervals or when you open the Up app, and this will track movement in daylight — steps and whatnot — and when put into sleep mode, will track the motion, heart rate, and more to get you a better understanding of how you’re sleeping, with REM cycles added to the mixture of light sleep, deep sleep, and being awake.


Going from daylight to sleep is as simple as tapping the Up 3 band to wake it up and holding your finger against the band, which will switch you between the two modes, daylight — with an orange figure lighting up — and sleep — with a blue moon.

That’s a fairly new control system, too, borrowed from the Up 2 — just like the one-size-fits-all band you get to wear — with a reliance on a capacitive touch panel that surrounds the middle of the band.

This inclusion eliminates the need for buttons, which should improve durability, but we’ll get to this later, because the not-quite-touchscreen nature of this part isn’t going to be ideal for all.

Fortunately, the Up app is as good as it ever was.


Just like with the previous Up incarnations, the app is one of the better parts, with a clear understanding of how you’re doing, fairly frequent synchronisation, and a social side of things that allows you to compete with your family and friends that have joined the Up system through either a gadget or an app on a smartwatch, which is also a possibility these days.

The information taken from this platform is fairly rich, too, with a break down of your activities over the course of a day, revealing how often you walked, were active, how many calories you burned, and so on, with the sleep showing the time it took to fall asleep, when you woke up, and a little more, too.

During sleep, your heart rate will be tracked, which is about the only time it happens on the Up 3. We’re told this will change later on as Jawbone’s people work on ways to make the Up 3 do more, but right now, it tracks heart rate while you’re sleeping and tells you how much water you should be drinking.