This is a COMPANION APP to the Tempest Game Clock (available at tempestclock.com) A unique, tournament-style heavy-weighted game clock that uses your own android phone as its high definition, full color display. This app is intended only for owners of the Tempest Game Clock: a deluxe heavy-weighted, traditional form factor chess clock (using a patented precision rocker controller during play, not the touch screen). It pairs with this app to deliver clear analog and digital game timing with or without increments, delays, sudden death or OT time controls. Perfect for Chess, Backgammon, Go, Scrabble, Othello/Reversi, Checkers/Draughts, and other board games. Tempest features a strict TOURNAMENT MODE - which disables all phone / text functionality during rated games per FIDE and USCF guidelines. To see the clock in action and to order yours, please visit tempestclock.com.