Alt-O-Meter uses the barometer (air pressure sensor) in your late-model iPhone or iPad to calculate your precise height above sea level. Great for hiking, skiing, driving through mountain passes, flying, and more!
• Reads ambient air pressure for a more precise reading than GPS.
• Realistic, retro style. Looks like a classic airplane's altimeter!
• Automatically calibrates for local atmospheric pressure.
• ...also allows precise user calibration (optional; for advanced users)
• Uses GPS hardware in devices that lack a barometer.
• Completely free! No ads or in-app purchases.
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User Rating
4.43 out of 5
7 ratings
in United States
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Reviews
As close as you get to a flight-certified alitimeter without actually being one
Update: The dev's very responsive reply fixed the issues and my Alt-O-Meter is back to "it just works"! Thank you, dev, for the quick reply! 5* and well deserved.
Kollsman window & QNH missing. QNH no longer settable or reported. Auto Calibrate button now called "Start Updates"; when active, nothing much happens but the 100' pointer hunts erratically by a few feet. iPhone 12pro/iOS 17.4.1/app v.2.1 Those issues aside, this app holds truest to an aviation altiimter of all the others Restoring the auto-calibrate feature a while back was a big plus. Hoping the current glitches are only temporary... 5-star app! (-1 for the current issues).
Awesome!
I love this app! Also useful for baking as recipes need to be adapted for the altitude. Love it!
Works well; but only QNH is user settable
It would be very handy for hiking to be able to sit to the known altitude at this location, or the stored altitude of other locations. Display is attractive and easy to read and filters noise out of the pressure readings.
Simple and clean design
Nice clean design and does almost exactly what I need except doesn’t support the rest of the world’s standard units. Any chance you could add mbar’s/hPa for the QNH setting, and meters for altitude? They do need to be separate settings as some countries like Australia use hPa for pressure but feet for aviation altitude.
Not bad but...
Siri says I'm at 771' and your app says I'm at 739' (auto-calibrated).
One of you is off by 32' which could get someone killed.
