Mobile web usage overtook that of desktop in 2016, with the rise in mobile usage doubling the loss seen on desktop. This increase in mobile traffic has made mobile user experience one of the most important factors in the success of a product or website. Providing great user experience is essential from the first second, more than 60% of users will not to return to a mobile site they had trouble accessing, which means that content, navigation, and visual design elements must be twice as intuitive as they are on a desktop. With facts like these, designers must constantly keep in mind the point that little screens have very little room for error. Interactive Design for Screen is the result of an extensive research centred in the latest designs of screens for mobile devices. The more than 100 projects contained here showcase the functionality and accessibility of great mobile user interfaces. Designers analyse their projects from a variety of perspectives such as product features, site purpose, target users, etc., making it a highly practical and very inspiring guide for students and designers who know that a great mobile user experience is nothing less vital.