EICS 2013 is the fifth international conference devoted to engineering usable and effective interactive computing systems. Topics of interest include multi-device interactive systems, new and emerging modalities (e.g., gesture), entertaining applications (e.g., mobile and ubiquitous games), safety critical systems (e.g. medical devices), and design and development methods (e.g., extreme programming). Papers should address issues of interest to developers rather than end-users of interactive applications. EICS focuses on methods, techniques, and tools for designing and developing interactive systems. The conference brings together people who study or practice the engineering of interactive systems, drawing from HCI, Software Engineering, Requirements Engineering, CSCW, Ubiquitous and Pervasive Systems, and Game Development communities. The conference proceedings are published by the ACM and appear in the ACM Digital Library.