Those are two entirely different things. The app only grants access to chat, dice roller character sheets and handouts, and is written for tablets, not Chromebooks. There are two main ways to use Roll20 via tablet: Roll20 for iPad and Android , the free native applications with player-focused elements like character sheets and dice rolling or Roll20 Table on Tablet Support , a Plus subscription feature which grants access to the whole of the Roll20 virtual tabletop via supported mobile browsers. Since you are a plus subscriber, you should just be able to fire up Chrome and run it from a tablet's mobile browser. Note, a phone's smaller screen may make this an exercise in frustration. I don't think the app will run (or is even intended to run) on a Chromebook)