Graphical user interfaces (UIs) for PCs will most likely not fit relatively small screens of devices like today’s Smartphones. Providing dedicated UIs for several devices manually, however, is costly and takes time. Therefore, we have developed an approach to (semi-)automatic generation of UIs for various devices. A designer defines classes of dialogues in a device-independent discourse model. Such a discourse model can be also viewed as specifying classes of scenarios, i.e., use cases. It refers to a domain model that specifies the domain-of-discourse of the dialogues between user and application. From such models, we can generate UIs (semi-)automatically. Recently, we included in this generation process automatic optimization based on heuristic search. In effect, this tutorial shows that and how user interfaces can be automatically optimized for your Smartphone.