Rockr (also known as rock-paper-scissors, scissor-paper-stone, pierre-feuille-ciseaux, piedra-papel-o-tijera, jan-ken-pon, rochambeau or dung-pa-ski) is at long last available for iPhone. For too long, business travellers, students, bankers and surgeons have been without this invaluable tool, but now, thanks to the tireless work of our research technicians at Kontrollfeld, s/he need never be without rock-paper-scissor again. To play, simply shake the iPhone three times. The accelerometer responds, a voice counts you in and on the third shake, rock, paper or scissors is selected. You can set Rockr to select for you, using its sophisticated randomising algorithm, or the more advanced user can select manually. Whether you're in Moscow, New York or Amsterdam, with a range of graphical styles and international voices to choose from, you can do business the Rockr way.