This document describes a proposed mobile app called 15:15 that aims to revolutionize the art viewing experience. The app would allow audiences to anonymously interact and share thoughts during 15-minute viewing sessions at a pop-up art gallery also called 15:15. User personas Claire and Richard are introduced who feel isolated viewing art alone and want to connect with others. Research found most people never talk to strangers at galleries but make friends online. The proposed solution is an app allowing anonymous discussions to inspire connections between like-minded viewers during temporary exhibitions.