Altimeter applications.
Receive iphone using GPS location to display the altitude.
When hiking, when traveling, your use.
I wonder altitude in the mountains, or you are wondering when the height of the terrain to use this application.
Current altitude, maximum altitude, minimum altitude is displayed.
The altimeter is m, ft, yd units can be displayed.
Depending on the altitude display tick marks on the scale of 10, 100 scale, 1000 scale, you can adjust the magnification of 10,000.