Turn your phone into a real working aircraft altimeter. Features:* Touch and drag to set reference pressure.* Set reference pressure based on nearby METAR stations.* Altitude in metres and feet.* Pressure in hPa, mbar, or inHg.* Easy to use. * No ads.This app is only available for devices with a built-in barometric sensor.DISCLAIMER:This is not an approved aircraft instrument. This software program can not take the place of an approved and properly calibrated aircraft altimeter. For education purposes only. IMPORTANT NOTE: This altimeter will not work inside a pressurised cabin, like those found on an airliner.There are free versions available here:https://play.google.com/store/apps/details?id=st.crosscheck.realaltimeterplus (ads)https://play.google.com/store/apps/details?id=st.crosscheck.realaltimeter (no auto calibration)