Calculate the boiling temperature of water and the air pressure for your current elevation on earth or any other altitude.Features:- Read your current altitude from GPS- Get your current altitude from ASTER (NASA) if GPS is not available- Use the GeoNames database to search for the altitude of any location- Change the altitude manually- switch between metric and imperial units Keywords:altitude, elevation, water, boiling, point, air, pressure, height, earth, gps, temperature, school, physics