GymRegister is an application for Android OS to manage courses of a gym or any other sports activity, check payments and users data. It has a simple and intuitive graphical user interface, GymRegister allows you to manage your courses on your tablet. It has been designed to ensure maximum efficiency by optimizing the code and the use of algorithms that can handle large amounts of data. Product features: • Manage an unlimited number of users • Management an unlimited number of course • Management of monthly payments • Notes for users and courses • Automatic saving data • Ability to export member's datas in pdf file Source code available on https://github.com/alessiomanai/GymRegister