The ubiquity of mobile devices has opened the way to extending learning environments far beyond the constraints of the traditional foreign language classroom. This book seeks to advance the knowledge about effective learning and teaching of English for Medical Purposes supported by mobile environments. The author investigates the effectiveness of the use of a mobile version of a flashcard spaced-repetition learning platform. In conclusion, she presents core principles of an educational solution that supports the ongoing and situated learning of English for Medical Purposes by designing a mobile spaced-repetition medical vocabulary tutor ("Mobile Medical English Companion").