

It can also measure skin temperature and heart rate, and detect signs of atrial fibrillation, an irregular heart rate condition.Ĭombine all of that with a smaller, thinner body than the original Sense, a tile-based UI, and a battery life that supposedly lasts six days, and you’ve got most of the health tracking you could ask for in one smartwatch. A new “Body Response sensor” will give you more detailed looks at what causes stress in your body, so you can plan around that and adapt to those triggers over time. With a square display, the Sense 2 vaguely resembles an Apple Watch, at least from a distance. Generally speaking, each more expensive Fitbit model adds a bigger display and more health-tracking features, culminating in the most premium model, the Fitbit Sense 2.
