This software entitled as AirDensity 1.0, is a Palm-OS application and helps you calculate both Air Density and Density Altitude. It works as a flying air density calculator that can calculate air density and density altitude based on input of three variables: temperature in Fahrenheit, relative humidity as a % saturation, and barometric pressure.

If you are a pilot, you can then use the density altitude calculation to determine the length of runway that you need for lift-off given the weight of your plane, fuel, passengers and cargo.