Museums all over the world have been experimenting with and producing quality content for mobile devices. In this session, the focus is on how collecting institutions can provide content via mobile devices to users who are not visiting a museum venue. A number of examples are cited, including the experiences of Museum Victoria in Australia, which has produced several apps designed to be used outside the walls of the museum. A walking-tours app and science-based Field Guide apps are described. In this ‘how- to’ session, engaging audiences online and off site will be discussed, and the case will be made for developing apps versus mobile websites.