Siren Head Call Prank 2021 is an Android application developed by Dwutakt Developers. As the name suggests, this app is a fun way to prank your friends by making them believe that they are receiving a call from the infamous Siren Head. With this app, you can easily make fake calls to your friends and family, and they won't even know that it's not a real person calling them.

The app is free to download and use, and it falls under the Lifestyle category. However, it's important to note that this app is intended for entertainment purposes only and does not provide true calling functionality.