This book constitutes the refereed proceedings of the international competition aimed at the evaluation and assessment of Ambient Assisted Living, EvAAL 2012, which was organized in three major events: the Second International Competition on Indoor Localization and Tracking for Ambient Assisted Living, which took place in Madrid, Spain, in July 2012, the First International Competition on Activity Recognition for Ambient Assisted Living, which took place in Valencia, Spain, in July 2012, and the Final Workshop, which was held in Eindhoven, The Netherlands, in September 2012. The papers included in this book describe the organization and technical aspects of the competitions, and provide a complete technical description of the competing artefacts and report on the experience lessons learned by the teams during the competition.