Opens music app when Jack is detected and closes it* when removed.
Also works with up to 2 Bluetooth devices: opens the app when connected and closes it* and disables Bluetooth when disconnected
Set to Google play music by default
Just press start and go with the flow ;)
If you do not own any Bluetooth devices press "cancel" when prompted.
To choose the devices you need to have paired the devices at least once before hand or have them close by and turned on when setting up.
*App closing doesn't work with every devices.
V2: Now the flow prompts you to choose an app and two Bluetooth devices
Rate and review within the app in the Community section.