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 timing with increments, delays, sudden death, or overtime controls. Ideal for chess, backgammon, Go, Scrabble, Othello/Reversi, checkers/draughts, and other board games. Tempest includes a Tournament Mode, disabling phone/text functions during rated games, adhering to FIDE and USCF regulations. See it in action and order yours at tempestclock.com.