Multimodal operating systems such as Apple or Android are being integrated into several platforms and devices, increasing users’ connectivity experience. Recently, both operating systems (OS) had been integrated into modern vehicles, extending connectivity possibilities to road transport, providing them with new driving experiences for the user. In the present study we attempt to evaluate, under a holistic scope, the users’ experience with these systems while driving. We have developed a new scale based on a user-centered and cooperative design approach which will be tested for the first time in a two-case study. With this scale, we will assess the main variables that influence the user’s experience when interacting with in-vehicle smartphone integration systems while driving. We hypothesized that the scale will be capable of discriminating between both systems, their tested functions and between users. Despite results seeming to support this hypothesis, further research with wider samples and systems is needed.