Two key ingredients for developing language skills are output and interaction. The use of computer-mediated communication (often referred to as "CMC") tools and of social networking sites (SNSs) offer a valuable resource to English language teachers and learners who wish to extend learning beyond the classroom walls, especially as traditionally in-person courses shift to online formats. Recent years in particular have seen exponential growth in the number of platforms available to teachers and students for virtual interaction. In this article, Anna Ciriani-Dean shares her ideas on using a specific mobile-only application for stimulating spontaneous oral communication and providing feedback to learners. The app is called Marco Polo and it allows users to easily record videos and send them directly to a single user or group. Marco Polo is best for teenage and adult learners who have access to their own mobile devices and are above the minimum age (13) to download the app. Ciriani-Dean begins by explaining the features of Marco Polo that make it ideal for language learning. She then provides instructions on how to use the app for a learning activity, and she describes two tasks that can be implemented on it.