AeroAltitude calculates pressure altitude (PA) and density altitude (DA) either from user data inputs or automatically by using built-in GPS, built-in barometer*, and METAR** of airports. Overview of features: - PA/DA/QNH calculation for current position using GPS and barometer (enter temperature manually) - PA/DA calculation based on user inputs for altitude, QNH, and temperature - PA/DA calculation of any airports from the built-in airport database. Including METAR display and chart of DA (on 4 screens and higher) - List of user defined airports showing PA/DA calculation - List of nearby airports showing PA/DA calculation - Includes watch app to display DA at current position, user, and nearby airports - User definable warning threshold factor - Sharing data via mail, message, etc. - All units are customizable - Pre iOS 14 today widget with PA/DA for maximum five nearby airports AeroAltitude uses the freely available Aviation Digital Data Service from US NOAA to get METAR data and can not be guaranteed. Internet connection required