Altimeter is an instrument for measuring the height above sea level for outdoor activities like trekking, mountain bike, camping, etc.
It's very important to understand that it depends on the internal iPhone GPS, and the sight of the sky should be very clear the gather the satellites signal.
When you first activate the software you should wait for about 30 seconds until the GPS get all the necessary data.
-Display Height, Max Height in meters or feet.
-Display Speed in km/h or mph
-Display heading in degrees.
-Calculate the difference between two levels in meters of feet.
-Release date : 21/06/09