Do you Know that iPad have a heading sensor, a digital Compass? Note, that iPad is shipped from factory without a compass app.
Compass HD comes to fill this void left in the Apple device. Offering a digital compass that looks like a real compass. Compass HD can function in all orientations.
A simple but very useful application when you want to know the orientation of cardinal points. Have you ever bought a compass as cheap as CompassHD?
Only costs 0.99$.