KEY FEATURES:

- Supports boost the sound files volume up to 1000%.
- Supports decrease or mute sound too.
- Supports video, audio, music, movie, memo, voice, audio book etc.
- Powerful audo equalizer with professional preset sound effects.
- Improves the sound quality with latest technologies for maximum sound amplification.
- Simple, small, clean, user-friendly and efficient!
- You can enjoy more immersive sound than ever.
- One-touch operation.

SUBSCRIPTION INFORMATION:

- Subscribe to get access to all the Premium features
- Weekly or yearly Premium Pass
- Features: Premium for Full Access. Boost all volume up to 1000%; No time limit; Ads free.
- Free trial subscription is automatically renewed unless cancelled 24 hours before the renewal
- Payment will be charged to iTunes Account at confirmation of purchase
- Account will be charged for renewal within 24-hours prior to the end of the current period, at the same price
- Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable.
- 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://jinyina1996.wixsite.com/volboom/terms-of-use
Privacy Policy: https://jinyina1996.wixsite.com/volboom/privacy-policy

*Price are equal to the value that "Apple's App Store Matrix" determines is the equivalent of the subscription price in $USD.