This companion app enhances the Tempest Game Clock (sold separately at tempestclock.com). This high-definition, full-color digital display utilizes your Android phone to complement the physical Tempest Game Clock—a premium, weighted chess clock with a patented rocker controller (not touchscreen). The app provides precise analog and digital timing options, including increments, delays, sudden death, and overtime controls. Ideal for chess, backgammon, Go, Scrabble, Othello/Reversi, checkers/draughts, and other board games. A crucial feature is the Tournament Mode, which disables all phone and text functions during official games, adhering to FIDE and USCF regulations. View the clock in action and order yours at tempestclock.com.