Voice Changer is a free iPhone app developed by JINMIN ZHOU in the Business & Productivity category. This app allows you to record your own voice or other external sounds and change them into different styles with various sound effects.

The app comes with different types of sound effects, including man, woman, and kids, among others. It's very convenient and easy to use, and the built-in recorder lets you record your own or other external sounds directly. Additionally, the app offers funny features like instant playback and easy editing of your recording files.

Overall, Voice Changer is a fun app that allows you to make hilarious voices and share them with your friends via email. If you're looking for a simple and entertaining way to change your voice styles, this app is definitely worth checking out.