In response to the growing demand for personalized online shopping experiences, the primary goal of this initiative is to provide users with an engaging platform to customize wrist watches before making purchase decisions. This project introduces an advanced 3D Watch Customization application that seamlessly combines the capabilities of Unity for 3D rendering and for an interactive user interface. Leveraging Unity's powerful 3D rendering, the app allows users to explore an extensive collection of watch models recreated in three-dimensional space. Through an intuitive Unity-based interface, customers can personalize various watch aspects, such as dial design, strap material, and case finish. A standout feature of the app is the incorporation of AR technology, allowing users to visualize their customized watches in real-world contexts. By utilizing device cameras, users can superimpose the virtual watch onto their wrists, offering a realistic preview of how the customized timepiece will appear and fit. This AR functionality seamlessly integrates into the application, enhancing the overall user experience and instilling confidence in the purchase decision.