Pure Volume Booster - Sound Boost is a free Android app developed by Polohalo, designed to boost the volume of your device's speakers. With this app, you can enhance the volume of your music, games, and phone calls, as well as use it as an extreme volume booster for headphones.

The app is small and simple to use, making it a great option for anyone who wants to increase the volume of their device without having to deal with complicated settings. However, it is important to note that the app comes with a warning to use it at your own risk, as distorted audio may occur if the volume is set too high.