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Alt-O-Meter

Alt-O-Meter

An Air Pressure Altimeter

8 ratings
17 reviews
💪 Health & Fitness
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Free

Details

  • Released
  • Updated
  • January 7, 2017
  • March 18, 2024

Developer

Joshua Hinman
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About

This app calculates your precise altitude above sea level using your device's barometer or GPS. It offers a realistic, retro design and automatically calibrates for local atmospheric pressure, with optional manual calibration for advanced users.

✓Barometer-based altitude calculation
✓GPS fallback for devices without barometer
✓Automatic local pressure calibration
✓Optional user calibration
✓Retro-style interface
✓Precise height above sea level
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What's New in Alt

2.1

March 18, 2024

Fixed a bug that caused the altimeter to display the incorrect altitude in a recent version of iOS

User reviews

Most RecentHighest RatedLowest Rated

Excellent

Love the auto calibration feature. I would like to suggest the following improvements: 1. Allow screen rotation from portrait to landscape. 2. Offer a plain digital display as an option to the aviation style display. 3. Add Apple Watch support. 4. Offer the app display as a widget on the home screen. 5. Have the ability to use GPS altitude, in the event that it is unable to get the current QNH from the server. I love it otherwise and appreciate that, being free, you would not want to work excessively on it. Thank you!
By the way, how often does the app poll the server for pressure changes, and how often does it read the phone’s barometer chip?
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EuroflyerEuroflyer

Good it can display hPa units now…

…But lacks hPa decimal for more precise calibration, also direct altitude calibration would be great.
No ads : great feature !
TimjobarTimjobar

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).
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JRobert.WiltonJRobert.Wilton

v2.1 has a couple of new glitches

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).
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Jrobert.in.WiltonJrobert.in.Wilton

Response from developer

Thanks for the review! I’m glad you’re enjoying the app. In regards to your issue, please go to Settings->Alt-O-Meter and ensure that you’ve enabled the “Motion & Fitness” permission. The app needs that enabled in order to detect your ambient air pressure, otherwise it falls back on showing GPS altitude. No other motion or fitness data will be accessed by the app; only ambient air pressure. Thanks again for using my app, and I’m glad you’re enjoying it!

Soon adapted

very nice design but lack the hpa setting (or mbar). So not friendly in our European countries .

Update Déc 2023: hpa setting is there. A very useful app to have.
Thanks Joshua!!
gerard_opiogerard_opio
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FAQ

What is Alt-O-Meter?

Alt-O-Meter is a free application that uses your iPhone or iPad's barometer to determine your precise altitude above sea level. It can also use GPS on devices that lack a barometer.

How accurate is Alt-O-Meter?

It provides more precise readings than GPS alone by utilizing ambient air pressure. The app automatically calibrates for local atmospheric pressure, and advanced users can perform optional manual calibration.

Does Alt-O-Meter have ads?

No, Alt-O-Meter is completely free with no advertisements or in-app purchases, offering an uninterrupted user experience.

What devices support Alt-O-Meter?

Alt-O-Meter is compatible with both iPhone and iPad devices, leveraging their built-in sensors for altitude measurement.

How often is Alt-O-Meter updated?

The app was last updated on March 18, 2024, indicating active development and maintenance by the developer.

What is the age rating for Alt-O-Meter?

Alt-O-Meter has an age rating of 4+, making it suitable for a wide range of users, including children.

Can Alt-O-Meter be used offline?

Yes, as it relies on the device's barometer or GPS, Alt-O-Meter can function effectively even without an internet connection, making it ideal for remote areas.

What makes Alt-O-Meter different from GPS altitude?

Alt-O-Meter uses the barometer to measure air pressure, which is a more direct indicator of altitude than GPS. This method generally leads to more accurate and responsive altitude readings.