Lautstärke erhöhen funktioniert nicht

App can help to improve your hearing, but can't resolve your hearing problems, it is not approved as a medical device or software and cannot be used as a hearing aid with doctor`s prescription. * Subscription Volume Boost – Sound Amplifier get access to all functions of the application. * You can turn off the auto-renewal at any time: you'll find the option to do this change to a different payment plan in the settings of your iTunes and App Store account. * The first time you can try the free trial for 3 days.  The app adjusts to specific features for each ear using a built-in test. -- Support of Bluetooth headsets and Air Pods.  PLEASE PAY ATTENTION that the app is not intended for medical use, to obtain accurate data please consult your doctor.  Do not delay the visit to your doctor if you have some problems with your hearing.  Use the power of your smartphone and latest technologies for maximum sound amplification.  App helps you to improve your sound perception.  Increase the volume and improve the sounds around you.  After that, your account will be automatically charged for the subscription if you will not stop it before the end of the free trial. * The length of the subscription is 1 month, this subscription is auto-renewing. * Account will be charged for renewal within 24-hours prior to the and of the current period, and identity the cost of the renewal.