In this paper the research draws upon reminiscence therapy, which is used in treating dementia, as an applied theory to promote well being in people who experience low moods. The application proposed here aims to promote wellbeing for people suffering from mood disorders and dementia but could potentially be used to enhance wellbeing for many types of users. Use of the application is anticipated to improve mood in a group of users where severe emotional problems are prevalent. The research aims to evaluate the effectiveness of a reminiscence based application in promoting well being in people specifically with Borderline Personality Disorder (BPD). The long term objective of this research is to establish the effectiveness of reminiscence theory on user groups aside from dementia, particularly other mental illnesses. The research advocates involving end users within the design process both to inform and evaluate the development of a mobile and tablet application.