FMX Application refers to software developed using the FireMonkey (FMX) framework, a cross-platform application development framework included in RAD Studio. FMX supports creating visually rich, GPU-accelerated, and responsive applications for multiple platforms, including Windows, macOS, iOS, Android, and Linux, from a single codebase.

FMX applications feature a flexible UI design with drag-and-drop components, enabling developers to create modern, touch-enabled interfaces. The framework supports vector graphics, 3D rendering, and animation, making it ideal for apps requiring advanced visuals.