Prank App: Fart Sound-Air Horn app has become a popular way to pull harmless jokes on friends and family. One of the most popular Prank App is the Prank App: Fart Sound-Air Horn, which offers a variety of Fart Sounds and Air Horn Noises that you can use to Prank your friends. Prank App: Fart Sound-Air Horn app also includes a Cracked Screen effect that can make your friends think their phone is broken. Another popular prank option is the haircut prank, which simulates the sound of Hair Clippers