Fluid UI is a web-based prototyping tool that helps you create interactive mobile and web prototypes quickly and easily. It has a drag-and-drop interface, a library of UI elements, and a range of collaboration features.
Build interactive web, iOS, Android, and other low or high-fidelity prototypes right into your web browser. Drag and drop ready-to-use, easily customizable templates, UI components, icons, and more, to prototype in minutes! No coding skills required.