Volume Booster is the great tool to optimize your phone's volume, Android Volume Booster is Simple, small, experimental free app to boost your speaker or headphone sound volume and speaker also. Useful for movies, audio books, music and Ringtones
Volume Booster will make your phone sound much more stronger.

How to use:- Simply press the volume icon and let the app calibrate your sound overall volume stronger by 30-40%!
Features:
* Increase speakers volume by 30-40%.
Effects created on Application's below default Tones.
1 Alarm Sound.
2) Music Sound.
3) Notifications Sound.
4) Ringtone Sound.
5) System Sound.
6) Voice Call Sound.
NOTE: This application doesn‘t change any phone settings or else.
Its absolutely free to use, so go for it.
(1) Not all devices support this application.

Enjoy !!