Download BEN10 MouthOff™ from iTunes The new sound-reactive  BEN10 MouthOff™ iPhone game app by ustwo™ and Cartoon Network. Have you ever wondered what you’d look like with the mouth of a Ben 10 alien? Because now it’s possible! Use the Omnitrix interface to select one of 10 official Ben 10 characters, hold your iPhone in front of your mouth and start to speak (or roar). Download the MouthOff™ iPhone apps from iTunes. Read more about BEN10 MouthOff here