The VOR Viewer presents a picture of the relative location of the aircraft and a VOR/DME. This presentation shows how an HSI is used to determine this position. Use the button on the right to select the mode of operation.

In Gravity mode the aircraft can be moved by tilting the iPhone.

In Random mode the aircraft will randomly change heading when it hits the wall.

In Drag mode the aircraft and VOR/DME can be moved by touching and dragging to set up the desired relationship.

The Heading can be changed using the slider in Drag mode. The OBS can be changed using the slider in any mode, the currently selected radial is shown as a red line.