Volume Booster funktioniert nicht

This is also a great speaker booster if you use a Bluetooth speaker to listen to music or if you use a good music system with a subwoofer. - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the period. - If you want to continue the service, your subscription should be continued. - The account will be charged for renewal within 24-hours prior to the end of the current period. - There are 3 packages including: 1 week, 1 month and 1 year with the weekly package allowing a 3-day trial period.  Volume booster can increase volume of all media, including music, video, ringtone, alarm volume and etc.  If you don’t have a pair of headphones or if you want to use a speaker, you can still enjoy good music with our app.  Volume booster is a simple, small but powerful app to boost volume of your phone and tablet to extra volume.  Useful for movies, audio books, music and games.  Note: To get the best results, pair this app with your best headphones.  Once it expires, your subscription will automatically renew. – 1-week subscription with a 3-day trial version – US$ 4. – 1-year subscription with a 3-day trial version – US$ 29.