Little by little, (or, simply, MALL) is taking force in the field of education, as it supports language blended learning and language learning ubiquity. The study presented here belongs in the Social Ontology-based Cognitively Augmented Language Learning Mobile Environment (SO-CALL-ME) research project, whose final aim is to design and create English as a Foreign Language (EFL) mobile applications (henceforth, apps) that apply a solid pedagogy to teaching technical and language skills. Thus, these apps provide a very flexible form of learning that is also practical, interactive, adaptive, dynamic and deeply rooted in daily sociocultural situations and contexts. In particular, our study has aimed at designing and implementing an app to help its users create and perform successful business presentations. Thus, the potential users of our app are both professionals and students in general, since business presentations are a compulsory and essential activity in most professional environments nowadays. Using our app will allow them to learn these skills ubiquitously and autonomously, since it contains self-evaluating (automatically corrected) exercises. [The research described in this paper has been partly funded by the "Spanish Ministry of Science and Innovation", Grant FFI2011-29829.] [For the complete volume, "New Perspectives on Teaching and Working with Languages in the Digital Era," see ED565799.]