A free app for Android, by ZekaiMedia.

This application is designed to increase the volume of your audio files.

How does it work?

First of all, you have to download this application. After you install it, you will see a new icon on your device’s home screen. Now, you have to open this application and click “Boost Volume” button to start using it.

Select the sound file you want to hear better and then click the button. You can pick volume levels ranging 30%, 60%, 100%, 150%, and 200%.

And, if you want the volume to return to normal, you may simply click the “Stop” button.