A versatile open-source development tool suite enables the creation of mobile applications for both Android and iOS platforms. With Fuse, developers can craft native mobile user interfaces by utilizing the user-friendly UX Markup language, while JavaScript is employed to implement business logic. The UX Markup is a streamlined, declarative XML-based language designed for creating vibrant user experiences and is supported by a cutting-edge layout engine and GPU-accelerated graphics. It has been crafted to be highly expressive and easy to learn, making it challenging to encounter mistakes. Fuse emphasizes an engaging, real-time workflow, allowing for modifications to be made while the project is in operation. By leveraging a local zero-configuration development server, any updates made to UX, scripts, or assets lead to almost immediate changes in the live application. This capability not only enhances efficiency but also fosters a new realm of collaboration among developers. Moreover, with UX Markup, animations are prioritized, making nearly every property capable of being animated for a more dynamic user interface experience.