Butler

Butler uses user-defined locations to set user-defined levels of volume

Butler is an app that lets you define locations and volume level for each location and then it automatically adjusts the volume once you are in that area.

Very energy efficient and energy saving - it doesn’t use the GPS module constantly but instead it is only triggered when on location.

It's particularly useful if you regularly visit a place where you want to have a sound profile different than your usual, i.e. silent mode in the office, moderate volume at home, etc.

There is always a default profile that is used by default, e.g. when you leave a defined location.