This software is designed specifically for swimming relay competitions and supports timing in four relay modes: freestyle 4x100m, freestyle 4x200m, medley 4x100m, and medley 4x200m. Users only need to input the name of each player to easily start and manage the timing of the game. Timing is accurate to milliseconds to ensure fairness in the competition. Each athletes swimming time is recorded separately and can be switched to the next stroke to start timing during handover. After the competition, users can save the competition data for future reference or analysis.