489~RESERVATION SYSTEM~ is an innovative reservation management app tailored specifically for beauty salons, designed to streamline the scheduling of treatments and optimize staff time. The app significantly reduces the time spent on customer service by allowing clients to make reservations online, eliminating the need for phone-based bookings. By integrating with Shopify, the app links reservation details with order information, creating a unified platform for managing both reservations and sales. This integration simplifies administrative tasks and enhances operational efficiency. Additionally, the app supports functionality on a salon's official LINE account, making it easy for customers to book appointments directly through a familiar interface. Real-time updates ensure that booking information is promptly displayed on the dashboard, and payment processing is seamlessly accessed from the reservation details, facilitating a smooth transaction experience for both the salon staff and clients.