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Advanced Altitude Management for Pilots.Integrated with a pilot designed flexible alerting system and VNAV (Vertical Navigation), AltitudeAlert is the first App to bring advanced altitude management to ALL pilots.VNAV gives you unparalleled control of altitude. Use VNAV to define precisely HOW, WHEN and WHERE you want to be at a certain altitude. With customizable settings, you define how VNAV will work.ALT HOLD Mode is specifically designed for VFR pilots requiring virtually no setup. Just tap the button and AltitudeAlert will monitor your current altitude. This mode is great for student pilots, formation flying, and pilots of vintage, ultralight, and light sport aircraft with minimal instrumentation.Never miss an altitude assignment again. Set the altitude and AltitudeAlert alerts you prior to reaching it and again when you acquire it. Spoken alert announcements are customizable. Choose from a single chime or chime plus altitude remaining.Need to shoot an approach? No problem! Set the minimums and AltitudeAlert will alert you 100' above minimums and again at minimums.****Barometric sensor required (see SYSTEM REQUIREMENTS below).FEATURES:• iPad version runs along side or in the background while using your favorite EFB App, i.e. Foreflight, Garmin Pilot, FlyQEFB, etc.• VNAV (Vertical Navigation).• Alerting for supplemental oxygen use for both pilot and passengers.• Instrument Approach Minimums Alerting.****Barometric sensor required (see SYSTEM REQUIREMENTS below).• Automatic ground reference alerting at 1000' and 500' above touchdown.For devices WITHOUT a barometric sensor, AltitudeAlert uses GPS Altitude based alerting.A SUBSCRIPTION IS REQUIRED TO USE ALTITUDEALERT:• Two subscription options are available. Monthly and Yearly.• All subscriptions include a 1-month FREE TRIAL. • Price of the subscription is $1.49/Month USD or $12.99/Year USD.Payment will be charged to your Apple ID account at the end of the free trial period. Your subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. You can manage and cancel your subscriptions by going to your account settings on the App Store after purchase.No cancellation of the current subscription is allowed during and active subscription period.*** SYSTEM REQUIREMENTS ***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 GPS NOT Supported at this time.Minimum hardware requirements to use the barometric features of the app (devices that DO have the barometric sensor):• iPhone 11, 11 Pro, 11 Pro Max• iPhone Xs Max, Xr• iPhone Xs, X• iPhone 6+, 7+, 8+• iPhone 6, 7, 8• iPad Mini 4 or newer• iPad Air 2 or newer• iPad Pro (any size) or newerMinimum hardware requirements for GPS based alerting (devices that do NOT have the barometric sensor):• iPhone SE• iPad 4 or older• iPad Air• iPad Mini 3 or older*** PLEASE NOTE ***Continued use of internal GPS running in the background (if applicable) can dramatically decrease battery life.Barometric pressure sensing features of this app will NOT work correctly in PRESSURIZED aircraft. In this case, use GPS altitude reference and associated features of the App.For more information on Terms & Conditions, please visit http://www.altitudealertapp.com/eula.html