AO SmartX-Fit Pro is a free lifestyle app designed for Android devices, serving as an essential companion for compatible smartwatches. This app allows users to synchronize vital health and fitness data, including steps taken, calories burned, distance traveled, sleep patterns, and exercise logs. The user interface enhances the display of this data, making it more accessible and visually appealing. Additionally, users can receive notifications for phone calls and text messages directly on their smartwatch, ensuring important information is never missed.

The application further enables customization of smartwatch settings such as sedentary reminders, alarm configurations, and backlight options, enhancing the overall user experience. It supports specific smartwatch models, including the LUNARVISTA and AM18 series, with promises of timely updates for any future models. AO SmartX-Fit Pro effectively combines fitness tracking with practical smartwatch functionality, making it a valuable tool for health-conscious users.