A free app for Android, by VIZ Soft AD.

Subwoofer Bass Booster is a simple app for Android devices that can be used to boost the bass of your smartphone or tablet. This application is compatible with both tablets and mobile phones and can be used as an audio amplifier for speakers or headphones.

The application consists of a small and simple user interface that allows you to boost the bass in just a few taps. The app also has a built-in equalizer for music which can be used to improve the sound quality.