Fitbit is a popular health and fitness app designed to help users track and improve their health. Through the use of smart bracelets, smart watches and other devices and apps, Fitbit provides comprehensive health data analysis, exercise tracking, sleep monitoring and other functions, so that users can better manage their health. Fitbit is a Us-Based health technology company, and its Fitbit app is one of its core products. The Fitbit app works with hardware devices such as Fitbit smart wristbands and smartwatches to track users' health data such as exercise, sleep and heart rate through sensors and algorithms, and provides personalized advice and guidance to help users develop healthy lifestyle habits.