Jawbone’s ability to cram so many sensors into the body of the while maintaining almost a week’s worth of battery life is commendable. On the flip side, its short USB charger leaves much to be desired. It’ll take several tries to get it right, and you’ll need to bend the charger upwards to charge properly.
The UP3 retains the level of accuracy that we loved in its predecessor, but this takes it another step further. With the introduction of ‘Passive Heart Rate’ you can also record your level of activity while you’re idle; whereas the ‘Duels’ feature combined with Jawbone’s Smart Coach constantly provides tips and prompts to improve your daily activities.
Standing around? “Inactivity alert!”