AltitudeAlert, the groundbreaking altitude alerting app for the iPad takes it to the next level with V2 and Mini V2. V2 harnesses the power of the iPad and iPhone barometric sensor (see hardware requirements below), delivering incredibly precise altitude data.

V2 is like having a virtual copilot with you in the cockpit.

Never miss an altitude assignment again. Set the altitude and V2 alerts you prior to reaching it and when you acquire it.

Need to shoot an approach? No problem! Set the minimums and V2 will alert you 100' above minimums and again at minimums.**

**Barometric sensor required (see HARDWARE REQUIREMENTS below).


• Run's along side or in the background while using your favorite EFB App, i.e. Foreflight, Garmin Pilot, FlyQEFB, etc. * (*AltitudeAlert for iPad V2)

• Alerting for supplemental oxygen use for both pilot and passengers.

• Instrument Approach Minimums Alerting.**

• Automatic ground reference alerting at 1000' and 500' above touchdown with landing gear alerts.

**Barometric sensor required (see HARDWARE REQUIREMENTS below).

For iPads and iPhones WITHOUT a barometric sensor. V2 and Mini V2 uses GPS Altitude based alerting. AltitudeAlert uses a special algorithm to correct for GPS altitude error.



All iPads need to have Wifi + Cellular (Wifi ONLY requires an EXTERNAL GPS* connected to the iPad such as Bad Elf Pro).

* Appareo Stratus 1/2/3 and uAvionix Sentry External GPS Not Supported at this time.

To use the barometric features of the app (iPads that DO have the barometric sensor):

• iPad Mini 4 or newer
• iPad Air 2 or newer
• iPad Pro (any size) or newer

Minimum hardware requirements for GPS based alerting (iPads that do NOT have the barometric sensor):

​​• iPad 4 or older
• iPad Mini 3 or older
​​• iPad Air ​​

*** PLEASE NOTE, AltitudeAlert for iPad V2 and AltitudeAlert Mini V2 are sold SEPARATELY *** 


To use the barometric features of the app (iPhones that DO have the barometric sensor):

• iPhone 6, 6+, 7, 7+, 8, 8+, iPhone X

Minimum hardware requirements for GPS based alerting (iPhones that do NOT have the barometric sensor):

• iPhone 5s, SE

General Guidelines:

Both apps are intended for use in aircraft without a panel mounted altitude preselector. If you have a panel mounted altitude preselector, this App may be duplicating functionality you already have.

Barometric pressure sensing features will NOT work correctly in PRESSURIZED aircraft. In this case, use GPS based alerting and reference the User Guide for more info.


Mini V2 (formerly AltitudeAlert for iPhone)

Fixed a bug that caused the App to crash on some iPhones when an altitude was selected with the Altitude Selector.


• Fixed a bug that was causing app to crash on launch with some iPhones.

• Corrected a bug that effected the Pilot and PAX Oxy Alerts.
• Optimized the GPS Accuracy Monitoring when GPS Altitude Reference is selected.
• Optimized the aural alerting engine.
• Other small tweaks

• Fixed Default Field Elevation form resetting after manual input of the altimeter setting or DA/MDA
• Fixed ALT Setting "Touch Zone"
• Fixed a bug that was inhibiting the app from resetting itself after landing
• Squashed some lesser known bugs


​• New name
• Added Barometric Altitude Reference
• IFR Minimums Alerting (Device with Barometric Sensor Required)
• Alert Margins are now customizable
• Maximum Altitude Alerting limit increased to FL459 (See User Guide)
• Default Field Elevation added
• "Altitude Acquired" alert added for greater situational awareness
• Many small UI changes
• Tons of under the hood optimizations!


• ALT Setting Switch to toggle local altimeter in either In Hg or hPa.
• Under the hood optimizations & Bug Fixes.


• Land Mode Optimization.
• Bug Fixes​.


• Initial Launch.

iPad V2


​• iOS 9 is no longer supported with this version. This is due to the many changes in code libraries that AltitudeAlert for iPad V2 uses.
• Small under the hood optimizations.


​• iOS 12 Compatable.

• Added a Power Button when the aircraft is on the ground, allowing you to shutdown the App if you desire.  Changes to CX ALRTS when the aircraft speed is > 40 kts.
• Added a SYNC Button to the Field Elevation Controls which allows you to quickly sync the Field elevation to the current Reference Altitude when on the ground.
• Made the SET DFLT Field Elevation button multi-functional.  When you touch and hold the button it will update the Default Field Elevation to the elevation currently set in the selector.  When you do a “quick tap”, it sets the Field Elevation selector to the Default Field Elevation.
• Added an AUTO Shutdown feature that occurs when the aircraft is stopped for more than 60 mins.
• Made some minor display changes.
• Changed the resolution of the Reference Altitude from 50’ to 10’.
• Changed the resolution of the Alert Margins from 100’ increments to 50’ increments.
• Rewrote User Manual for better readability.


• Corrected a bug that effected the Pilot and PAX Oxy Alerts.
• Optimized the GPS Accuracy Monitoring when GPS Altitude Reference is selected.
• Optimized the aural alerting engine.
• Other small tweaks.


• Corrected some small rendering issues with the Altitude Selector buttons.


• Added "Default Field Elevation". Now you can save a common field elevation that you regularly use (such as your home airport).
• Added a "GPS Signal Quality" indicator (Barometric Altitude Reference).
• Changed the "Ref Alt - PRES" label to "Ref Alt - BARO".
• Under the hood optimizations.


• Added a toggle switch in the App Settings that allows you to increase maximum alerting altitude to FL459.
• "Altitude Acquired" Highlight added to the Altitude Selector for visual feedback when acquiring your selected altitude.
• Optimizations and Bug Fixes.


• Initial Launch

iPad (Legacy Version)

August 5, 2018



• Legacy support advisory.


• Fixed a bug where ENTER and CLR buttons on lower resolution iPads would not render correctly.


• More under the hood optimizations
• Fixed a bug that inhibited the PAX OXY Alert from illuminating above 14000' after making an adjustment
• Added an alert to notify you when the Reference Altitude Alerting System has been stopped due to inactivity when the aircraft is not moving for 30 min.
• Fixed the version label from being displayed in the Slide In mode


• Bug Fixes and Optimizations.


• New Alert Parameter Settings!  Now you can control at what altitude AltitudeAlert generates its alerts.
• Enhanced Alert Testing for testing your iPad and headset prior to flight.
• Bug fixes and improvements.


​• ALT Setting Switch to toggle local altimeter in either In Hg or hPa
• Under the hood optimizations


 Corrected a display bug when the User Interface was "Swiped In"


• Altitude Quick Sync.

•  Corrected a bug uncovered that inhibited the iPad GPS from being activated in iOS 11.
•  Small UI fix when using AltitudeAlert in landscape mode while the in "Slide in" with another App.
​•  Introducing the new and improved LANDING MODE monitoring!
• This safety feature has only been available to pilots with more sophisticated GPWS or EGPWS systems.
​• When the Landing Mode is selected manually (or automatically), AltitudeAlert will generate a 1000' and 500' alert.
​• For pilots of retractable gear aircraft, "Check Landing Gear Down" is added to the 500' alert (see the User Guide in the HOW TO section).​


• iOS 11 Compatibility.


• Under the hood optimizations and squashed bugs.

• Updated to work with iOS 10 and take advantage of iOS 10's new enhanced Notifications!
• Redesigned User Interface.
• "Touch Zones" with popup numeric entry pads added for manual adjustments.
• Added a Test Audio button to set audio alert levels prior to takeoff.

Control your "Altitude"!​​

© 2018 Raymond Chase, All rights reserved