Altimeter (Barometer) Free!

This altimeter either uses GPS or the built in barometer (available since iPhone 6) to determine your current elevation on earth. While GPS provides the absolute altitude as long as you see the sky it is not very accurate. Features:- GPS and barometer based altitude- set a base altitude as starting point and get the altitude difference (e.g for hiking or biking)- calibrate the barometer altitude (connect the current air pressure to your current altitude)- calibrate with the help of GPS, the standard sea level air pressure or to any altitude you want- time difference to the last calibration- warning when it is time to calibrate- switch between metric and imperial unitsAd supported freeware