Fart Sound Free allows you to prank your friends by playing fart noises through your phone.
To play a fart noise with Fart Sound Free you just shake your phone. There are 12 different fart noises to select from in the drop-down menu. There's even a 'fart bomb' option on a timer where you can set up your friends by setting the timer and leaving your phone next to them.
Fart Sound Free is a crude app that will only appeal to those with a very childish sense of humor!