A free program for Android, by Crunchy ByteBox.
In the application, you can get the most precise and most accurate compass. You will be guided to the exact direction and you will be able to set your current location as a starting point.
The app uses your phone's built-in magnetic sensor to detect the Earth's magnetic field. The sensor will provide you with the exact location of the North, South, East, and West cardinal points.
You can also get information about the strength of the magnetic field and you can use the compass to detect the position of the Earth.
You can get all of this information for free and you can use the app for free.
