The consumption of legal drugs is a growing social problem, leading to chemical dependency and requiring interventions to ensure treatment adherence and prevent relapse. This project proposes the development of a mobile application, "Casulo," which uses gamification to encourage persistence in treatment. The developed solution includes features such as a registration form based on the DSM-V and the Transtheoretical Model of Change, a community forum with interactions regulated by a scoring system, the ability to register personal motivations, and a reward system with points and badges. The application also provides quick access to emergency contacts. The software is considered to have significant potential to aid in motivation and treatment maintenance, strengthening users' social participation and serving as a tool to support rehabilitation.