Raise the volume on call
- no need to turn up notifications

Grant permission READ_PHONE_STATE (mandatory) to get the basic functionality.
On incoming call the volume is adjusted to your preference. After the call the volume is reset to the previous setting.
If your phone is in DoNotDisturb mode however, nothing is changed.

Enable reading of the phone numbers so that the app can see who is calling you.
With this you can set a different volume for each number.

Grant permission ACCESS_NOTIFICATI