Super Voice Changer with Funny Voice Effects is a free app that lets you modify your voice. With it, you can create different voice effects, such as female, male, baby, old man, monster, etc. 

It has more than 40 effects and avatars, including those from the cartoon series "Superman." It also has a variety of sound effects, including those from the movies "Space Jam" and "The Hulk."

This application is great for making fun of others, and if you're in a party or meeting with friends, you can surprise them by changing your voice to an effect that matches the occasion. 

You can also use it to make a joke of your friends, and if you're in a concert or play, you can be the star of the show.