Automatic Volume Controller will allow to control the volume of your phone depending on your bluetooth devices or your earphones.
You will have to setup the app just one time.
For your bluetooth devices, launch the app and go in the tab « Bluetooth Devices», and adjust each devices as you want.
For your earphones, go in the tab « Earphone Modes » and then create new profiles. In order to use them, it's simple, when you plug earphones to your phone, a notifiaction will appear and you will be asked to choose a profil.
Automatic Volume Control Screenshots