The Sense 2 is the more expensive of the two, originally retailing at 299.99/269.99/445AU compared to 199.99/169. “It’s truly increased my awareness of how stress is impacting my body and encourages me to meditate before I go to bed so I can calm my mind and get a good, restful sleep,” Perez says. The Fitbit Versa 4 and Sense 2 launched at the same time, in September 2022. After wearing her Sense 2, which is 10% thinner and 15% lighter than its predecessor, for the last two months, Perez has noticed she gets most body response notifications at night. (Note: you can turn these notifications off if they get annoying.) It also provides action items you can do in times of a stress response, like taking a walk, meditating, and mood logging. When it detects a response, such as an increase in temperature or heart rate, it alerts you and asks you to reflect on how you’re feeling. Sense 2’s cEDA algorithm passively tracks metrics like skin temperature and heart rate throughout the day. “With Sense 2, we’re also introducing a new body response sensor that measures continuous electrodermal activity, also known as cEDA,” Elena Perez, Google Group Product Manager, tells SELF.

New fitbit versa 4