Converting Figma or XD designs into Flutter apps involves transforming high-fidelity design prototypes into fully functional, cross-platform mobile applications. This process ensures that the visual and interactive elements crafted in design tools like Figma or Adobe XD are accurately translated into Flutter's codebase. By leveraging Flutter’s robust framework, developers can create seamless, high-performance applications that retain the design integrity and user experience envisioned in the prototypes. This approach not only speeds up the development process but also maintains consistency across different devices and platforms, delivering a polished and professional end product that aligns with the original design specifications.