In Switzerland, 99% of teenagers own a mobile phone and use it as their primary spare-time activity. Exploiting the affordances that mobile devices have for fostering learning across contexts is therefore imperative for the educational community. This is especially true in the case of dual vocational education and training (VET)--a field under-investigated with respect to mobile learning--where apprentices alternate between a company and vocational school. After introducing the major issues characterising mobile learning and their relevance to the VET context, the paper presents a project involving apprentice chefs and their teacher, with the aim of exemplifying and exploring VET learning between workplace and classroom, as a conversation between the learner, the teacher and the in-company trainer, and to evaluate the results of its implementation in terms of usability, effectiveness, and satisfaction.