A method for distributing media content and tracking viewer impressions in an out-of-home context includes: a mobile computing device receiving an identifier of a first media content item; causing display of the first media content item to a first viewer; sensing image data of the first viewer during display of the first media content item; determining a location of the mobile computing device during display of the first media content item to the first viewer; sending the image data of the first viewer, and an impression-reporting message including: the identifier of the first media content item and the location of the mobile computing device during display of the first media content item to the first viewer.