Volume Booster | Bass Booster funktioniert nicht

Install the application, select the file for which you want to increase the volume, with a simple swipe select the desired volume level up to 1000% and download the finished file with one click! 1-week Subscription available. Lifitime Plan available.  Get full access to app features with Premium products. -Manage your subscriptions in Account Settings after purchase. -Payments will be charged to your iTunes account at confirmation of your purchase and upon commencement of each renewal term.  An easy way to increase the volume up to 1000% is the Volume Booster app.  Increasing the volume is suitable for any file: audio, video, audiobook and many others.  Volume Booster is what you need!  Now it's not a problem, just turn up the volume!  Tired of your favorite song not being loud enough?  Want to make your party more fun?  You can cancel your subscription or free trial in the iTunes settings.