GymBosses is a Web application for gym administration that depended on the support of an operator for account management, making it difficult to expand in the market. The goal of this project was to automate the creation and payment of platform subscriptions, achieve customer autonomy and improve the user experience. To carry out this project, principles of agile methodologies were used for the planning and development of the tasks. The necessary functionalities were implemented to give autonomy to the user, through a simple and intuitive platform, reducing considerably the time dedicated to support by the administrator.