NOT A FLIGHT INSTRUMENT
NOT FOR NAVIGATION
A bare bones pressure altimeter just like the one in an airplane (except red, for some reason). There are no additional features: if an airplane altimeter doesn't do it, this app won't do it. Unless you count "being red" as a feature.
Uses the pressure sensor in your Android device and the altimeter setting you provide to estimate your altitude. Don't have a pressure sensor? In that case, it pretends you're at sea level. Just to make it clear: this app won't show your altitude unless your device has a pressure sensor inside.
New to altimetry? Check Wikipedia to learn more about altimeter settings (http://en.wikipedia.org/wiki/Altimeter). Then check your nearest, most recent METAR (http://en.wikipedia.org/wiki/METAR) to learn the correct altimeter setting for your area.
Use the volume buttons to change your altimeter setting.
Long-press anywhere to toggle debug information.
Kalman filter smooths out sensor noise
Requires no special permissions at all
Free, no ads, code is public domain!
Imperial units only (feet, inches of mercury)
Pressure altitude only: does not integrate GPS altitude
Visit the website to get the code for yourself!