Music Booster: Sound Booster

A powerful Volume Amplifier that assist you in increasing the sound volume of bass volume video or enhance audio sound to achieve the effect of amplification.
Volume Amplifier ensures that the sound volume is increased without distortion. Bass volume video or audio sound quality will be clearer and more powerful through the mobile phone microphone.
Key Features:
Adapt to different types of environment.
Automatic adjustment to hearing specifics.
Amplify all sounds of bass sound quality files can be louder and higher level.
Subscription:
Volume Booster offers $6.99 /month , $19.99/6months subscription and annual purchase only $29.99. By tapping 'continue', your payment will be charged to your iTunes Account at confirmation of purchase. Your subscription will automatically renew unless the auto-renew is turned off at least 24-hours before the end of the current period. Subscriptions may be managed by the user and auto- renewal may be turned off by going to the user's Account Settings after purchase.
Terms of Use: https://sites.google.com/view/sound-booster-termofuse/home
Privacy Policy：https://sites.google.com/view/sound-booster-pp/home