Best Voice Changer is an app to record and change your voice. You can apply lots of different effects: one makes it sound like you're on a plane, another on the street, and another in the rain.
You can also make your voice go slower or faster, or imitate a robot, a cat, a squirrel, and other characters. The third and last feature lets you add a chorus or echo effect.
Once you've recorded your voice, you can choose to save it to your device's memory, or, if you like, make it a ringtone.
Best Voice Changer is a good app to play around with your voice and make you sound like many different things, some of them really funny.