The Fitbit Sense is a health-focused smartwatch with a variety of features, including: Battery life: Over six days of battery life Water resistance: Up to 50 meters Tracking: Step and distance tracking, sleep tracking, and 24/7 heart rate tracking GPS: Built-in GPS Exercise modes: Over 20 exercise modes Active Zone Minutes: Tracks Active Zone Minutes Touchscreen: Easy-to-use touchscreen that works as a watch Phone connectivity: Some versions can connect to your phone to play music, use GPS, and receive calls, texts, and emails