Engine Driver does not collect or use any private information from the user.
The device's "Android ID" is used internal to the app as a key when storing Preferences. The last 4 digits of this ID are used to create the default "Throttle Name", "Engine Driver nnnn".
The READ_PHONE_STATE permission is only used locally to your phone to (optionally) stop your locos while you are using the phone.
The ACCESS_FINE_LOCATION permission is required by Google for the app to read the WiFi SSID.