In 2010, South Africa hosted the football World Cup and introduced to the rest of the world the Vuvuzela. This horn that was supposed to provide a constant drone of fiesta-like noise during the games actually produces a loud and often annoying sound. Even the players on the field complained about it. For an Android app’s maximum price of $200, you can now have the sound of the vuvuzela in your device. Irritate the hell out of your opponents with a simple shake of your phone. Another shake and the sound will cease. By holding down the screen, an announcer can even scream similar to the style of Latin commentators after a goal has been scored. Make sure to inform your friends of your plan beforehand, or you may end up pestering them instead.