https://play.google.com/store/apps/details?id=cz.directservices.SmartVolumeControlPlus&feature=search_result#?t=W251bGwsMSwxLDEsImN6LmRpcmVjdHNlcnZpY2VzLlNtYXJ0Vm9sdW1lQ29udHJvbFBsdXMiXQ..