A free app for Android, by SoulApps Studio.
The free Volume Booster for Android, is a useful and easy-to-use application that can help you to increase the volume of your Android device. The app has a simple and intuitive user interface, so even if you have no knowledge of using the same kind of applications, you will not have any problems using it.
The best part of the app is that it is completely free. You will not need to pay a penny to use it.
If you are a music lover, you will not want to miss this application as it also has an equalizer that can help you to get the best sound quality!