This companion app enhances the Tempest Game Clock (sold separately at tempestclock.com). This high-definition, full-color game clock utilizes your Android phone as its display. Designed exclusively for Tempest Game Clock owners, a premium, weighted chess clock with a patented rocker controller (not touchscreen), this app provides precise analog and digital game timing. Customize your experience with increments, delays, sudden death, or overtime settings. Ideal for chess, backgammon, Go, Scrabble, Othello/Reversi, checkers/draughts, and other board games. Tempest includes a Tournament Mode, disabling phone/text functions during official games, adhering to FIDE and USCF regulations. View the clock in action and order yours at tempestclock.com.