Does anyone know of a volume increasing app that will work on the Samsung S4 ? I have the Volume+ app, worked on my old HTC Rezound, but the manufacturer states it will not work on some android phones (S4 included). I've checked in the playstore,which has many apps for this,however many of them require app permissions. Are they safe ? I'm just looking for one to enhance my music playing with earbuds, which the volume+ did very well.