This is the best app for changing your voice by applying effects on the audios.
It is very simple to use and can generate fantastic and funny effects.

Features:
Record audio and apply effect on it.
Open an audio and apply effect on it.
View edit the saved audios.
Share the saved audios to your friends via bluetooth or social networks.

It has the following effects:
Normal
robot(The best and authentic robotic effect among all voice change apps)
Chipmunk
Child
Old man
Martian
Chorus
Bee
Foreigner
Nervous
Drunk
Valley
Church
Telephone
Underwater
Twisted tongue
Duck
Creepy movie
Devil
Big robot
Small robot
Alien
Giant
Fan
Big Alien
Hoarse

You can also apply the listed effects for multiple times to generate tons of different effects for your voices.