A free program for Android, by Net Income Apps.

The free app for interval training is designed to be the most intuitive and easy to use. The main purpose of the application is to keep track of the time that you are spending in your favorite activity. It is a simple and modern design that makes the user interface clean and easy to understand. 

The user can select the interval for which he wants to train, select the activity, set the number of rounds and pauses. The user can also choose the sound and vibration settings. This application can be used for tabata, boxing, martial arts, and many other exercises and sports.

The main advantage of this application is that it allows the user to set his own goals and be more focused on the activity. The application can be used by the user for training and coaching.