Volume Booster Pro (com.ahmt.volumebooster) on Google Play
Crank your volume to the MAX!Increase your volume with one touch for FREE with Volume Booster Ultimate.Max Volume Increase:★Boost your device up to 46%.★Boosts volume to ringtones, alarms, notifications, videos and movies!Quality Boost:★ Increase the quality and crispness of your android devices sounds.Speaker and Headphones: ★ Not just a speaker booster.★ Booster also works with headphones giving you a louder experience.WARNING: Please be careful when wearing headphones. Extended exposure to loud sounds can permanently damage your hearing!