You can use the compatible ECG app (Charge 5) to assess your heart for atrial fibrillation (Afib) and share the results with your doctor. It's the first model to offer electrocardiogram (ECG) heart rate monitoring so you can record your heart's rhythm.Now that we've gotten some of the basics out of the way, let's break down the details and see if this fitness tracker makes sense for you. A few standout metrics include: All four sleep stages (awake, light sleep, deep sleep, and REM) with a subsequent sleep score, breathing rate, steps taken, floors climbed, menstrual cycle tracker, food and water intake, oxygen saturation (SpO2) monitoring, skin temperature sensor, stress management, active zone minutes and calories burned. Some metrics like your heart rate will track automatically, while others you can enter manually. The Fitbit Sense is equipped to track a multitude of metrics, providing you with detailed insight on your overall well-being. Additional bands can be purchased separately, including vegan leather, silicone, nylon, steel, and sports options. The watch comes in three color and style options: Sage grey band with a silver stainless steel frame Carbon/graphite band with a stainless-steel frame and a Lunar white band with a soft gold stainless steel frame. You can customize a long-press to invoke Alexa, timers, tools, and other functions. One press turns the watch screen on and a double press brings up shortcuts. The left side of the watch has an indent that functions as a haptic button, which means it uses vibrations to communicate. The rounded-square touchscreen is similar to a smartphone where you can swipe intuitively to access apps, metrics, and tools. The large band fits wrist sizes ranging from 7.1- to 8.7-inches (18-22.1 cm) in circumference.

The small band fits wrists 5.5-inches to 7.1-inches (14-18 cm.) in circumference. The watch screen measures 1.59-inches (3.8 cm.) across and. The underside of the watch (that sits on your wrist) is made of aluminum. Made from a stainless-steel frame, Gorilla Glass 3 display, and innovative bisensor core, the Fitbit Sense is built to last. Here's a Quick Look at the Fitbit Sense's Specs: Materials

Fitbit heart rate