Merry Miser is a mobile application that helps its users to make better decisions about spending. The application uses the context provided by a user's location and financial history to provide personalized interventions when the user is near an opportunity to spend. The interventions, which are motivated by prior research in positive psychology, persuasive technology and shopping psychology, consist of informational displays about context-relevant spending history, subjective assessments of past purchases, personal budgets, and savings goals.
