Monitoring and maintaining a healthier lifestyle is made easier with the Fitbit Charge 5 Fitness & Health Tracker. Built-in sensors monitor your body throughout the day and the Fitbit mobile app keeps stats to help you track trends over time. When it comes to health, the on-wrist heart rate monitor and ECG app can detect if you have an irregular rhythm and an EDA scan can tell when you're stressed. These sensors also assist in other health metrics, such as SpO2, HRV, breathing, sleep, and more.