The growing diffusion of smart home systems has given central importance to user interfaces, which must combine simplicity, reliability, and an engaging user experience. This thesis aims to design and evaluate a mobile application for managing an integrated home automation system, including the control of lights, smart sockets, room temperature control, shutters and blinds, cooling systems, and alarm systems. After a context analysis and a critical review of the literature and existing solutions, the design principles guiding the development of an innovative, graphically refined, and intuitive interface will be outlined. The prototype will be evaluated through questionnaires and user tests, with the aim of assessing usability, clarity, perceived satisfaction, and degree of innovation compared to current standards.