The Game Clock App serves for controlling the time in board games such as Chess, Go, Shogi and similar two-player games. It controls the time taken by each player by counting down from a preset starting time. Once the main time reaches zero, one of 9 different overtime schemes kicks in. These include Bio Yomi, Canadian Overtime, Progressive Canadian Overtime, Chess (with optional Sudden Death in one of the Extended Time Periods and optional Delay Time), Fisher, Bronstein, Simple Delay, Hourglass, or Sudden Death. The clock includes (optionally) visual and/or audible alarm when nearing time zero. The time control settings may be specified individually for each player.