Retroaction is a free Android application developed by Retroaction for sports associations and organizations to manage their schedules and attendance. With this app, members can easily view the schedule and indicate their presence or absence for various activities.

The user interface is simple and intuitive, making it easy to navigate and use. The schedule is displayed in a clear and organized way, allowing users to quickly find the information they need. In addition, the app sends notifications to remind users of upcoming events and allows them to set their availability in advance.

Overall, Retroaction is a useful tool for sports associations and organizations to manage their schedules and attendance. It is easy to use, free and provides a great way for members to stay connected and informed.