The rapid pace of technical innovation highlights the issues of the relationship between users, digital objects and environments, and, in the context of graphical interfaces, shows the existence of Visual-Digital Literacy. The digital medium, built by the intersection of different media that mix distinct visual genres, requires people to have a specific set of skills, since the instability of digital interactions defines a unique dynamic between designers, platforms and users. Hence, it becomes of the utmost importance to research on the different skills and processes of literacy developed by technology users when interacting in the digital sphere. This master s research proposes as an overall intention to investigate the impact of Visual Literacy, through the acquisition of repertoires, in users access to mobile devices. To that effect, the research hypothesis is that a limited visual repertoire is a direct cause of users deficiency in Digital Literacy skills. For a theoretical basis, the evolution of technologies and graphical user interfaces (GUIs) were raised; as well as outlined the concepts of Visual and Digital Literacy. Succeeding this review, two evaluation techniques were defined: an Iconographic Comprehension Test and a Usability Test. The final results of both applied techniques showed that Visual Literacy does influence on the performance of users in the interaction with devices, proving that Digital Literacy relates to people visual repertoires.