A free app for Android, by AppSmart.Dev.

If you want to boost the sound of your phone, you have come to the right place. This app can help you achieve the sound level that you are looking for. With the help of this app, you can listen to your favorite songs, movies, and other audio files at a higher volume level. 

The sound booster that you are going to use is quite easy to use. Just connect your headphones or other audio output devices to this app. Then, choose the volume level that you want to boost. 

This tool is a free audio amplifier that can be used to increase the volume level of audio files on your Android phone.