轻颖 is a utility application designed for iPhone users to manage weight and monitor various health metrics. The app features three main components: body data collection, health data analysis, and data storage. Users can collect data using a body fat scale and the app, enabling the calculation of various health indicators and local storage of their information.

In addition to local data management, 轻颖 can transmit measurement data to backend services via internet connectivity (4G or Wi-Fi), ensuring that users' health metrics are securely stored and not lost. While the application provides valuable insights into health data, it is important for users to consult healthcare professionals before making any medical decisions based on the app's information.