First, their sizes: the Fitbit Charge HR comes in three sizes, while the Jawbone UP3 is one size fits all and easily adjustable. For fashion coordination, the Charge HR comes in four colours, whereas the UP3 comes in only black or gray. With the UP3, each colour has a different design on the front, and more colours are expected soon.<!–
What it all comes down to is this: the Charge HR looks more like a smartwatch or activity tracker, whereas the UP3 looks more like a bracelet. One is sporty, one is elegant, and the one you find best all depends on the specific look you’re after.