The app keeps track of time, goal two expulsions per team, and period. You simply start and stop the time by clicking on the time. Expulsion is activated by clicking on each team's gray timer at the bottom. 2 minute expulsion. + and - to increase or decrease the number of goals. the period is in the middle, and when the time is over, the time is reset as the period changes. if it's 1, it's 2, it's 2, it's one. The menu has a reset option, settings, and about the program.