MIDA is a connected all-in-one auto-injector designed to make at-home cancer biologic treatment feel simple, guided and reassuring. The project translates hospital-level precision into a compact home-use device, with a focus on reducing steps, supporting correct handling and giving clear feedback throughout the treatment process. It was developed through user research, sketch ideation, prototyping, SolidWorks CAD, technical refinement and final visualisation.