Comparison

Nav Trainer Pro vs Density Altitude +

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Nav Trainer Pro

Practice aviation navigational equipment on your mobile device. Simulates VOR, HSI, RMI, ADF, DME, and ILS navigation. Ideal for student pilots, instructors, and flight simulator enthusiasts to improve IFR orientation skills and situational awareness.

Highlights
  • Simulates VOR, HSI, RMI, ADF, DME, and ILS navigation
  • Dual navigation displays
  • VOR/NDB trainer screen
  • ILS trainer
  • DME visualization screen
  • Test mode for situational awareness
  • Drag and drop aircraft and nav fix
Features
Currently charting
Read full description

Selected by AOPA.org readers as number one of five aviation apps you can't live without! * ***** Reached No. 4 in the Navigation category of the U.S. app store for iPad! ***** Make IFR flight training easier! Practice the use of aviation navigational equipment on your mobile device. Simulates VOR, HSI, RMI, ADF, DME and ILS navigation. A must have tool for any CFII, student and instrument pilot! -Students and pilots: improve your understanding of radio instrument navigation at the comfort of your own mobile device. -Instructors: demonstrate complex IFR concepts to your students from bird's-eye view while on the ground. -Also suitable for flight simulator enthusiasts. Used in classrooms, one-on-one ground sessions and by individuals to improve their IFR orientation skills. -------------------------------------- -user reviews (from all markets) ***** Great to study instruments and saves lots of $$$!!!" "***** I have been looking for an app such as this to teach my students" "***** Before I used this app all this VOR orientation was so complicated, and now it's clear as ice!" "***** Easy to use, perfectly designed and helping to understand basic navigation stuff. Highly recommended for student pilots, instrument applicant and CFI's." - Improve your situational awareness under IFR. - Save time and money on your instrument and initial flight training. - Prepare for your instrument rating or proficiency check. - Test your NAV situational awareness with the test mode. - Flight instructors: the perfect tool to help you easily explain and demonstrate complex radio navigation concepts to your students. ***Features:*** -Dual navigation displays. -VOR\NDB trainer screen: Simulates VOR and NDB navigation using VOR, HSI, ADF and RMI displays. -ILS trainer with both VOR and HSI displays. -DME visualization screen - demonstrates how DME slant range distance is affected by ground distance and altitude. -Test mode - generates phantom aircraft around the navaids. Your goal is to find the correct aircraft position. -Drag and drop the aircraft and nav fix around the screen. -Fly! mode - Make the airplane fly around the screen. great for practicing intercepting and tracking courses. -Wind direction & velocity control. -Aircraft tracing (contrail mode). -Accelerator support for aircraft control. How to use: -Select the various instruments by double-tapping their dials. -Toggle VOR sectors visualization on/off. -Auto tune OBS by pressing the OBS knob. -Auto turn the aircraft towards the nav fix by tapping the aircraft symbol. Double tap will turn the aircraft toward NAV station #2 -Change aircraft headings by flicking your finger over the heading indicator. -Tune the OBS by dragging your finger around the HSI/VOR displays or over the OBS knob. --------------------------------------- The developer is a Gold Seal CFI/CFII/MEI and part 121 airline pilot --------------------------------------- For comments, feature requests or bug reports, if you have the app, please take the survey at http://bit.ly/hCAqgF * (https://www.aopa.org/news-and-media/all-news/2013/february/26/five-more-aviation-apps-you-cant-live-without) **If you experience any problem with the app, please contact me before leaving a review and I will do my best to solve it for you.**

About

Density Altitude +

This app calculates density altitude and other atmospheric data using location, GPS, and onboard sensors. It's accurate even without a cellular connection and useful for pilots, racers, and sports enthusiasts.

Highlights
  • Density Altitude calculation
  • Relative Air Density (RAD)
  • Altimeter setting
  • Humidity calculations
  • GPS and barometer integration
  • Location search
  • Offline functionality
Features
Currently charting
Read full description

Instant and location accurate Density Altitude calculator/instrument app for iPhone and iPad that also finds relative air density (RAD), altimeter setting, relative humidity, specific humidity (grains/lb) and more. Super useful for pilots, especially in the backcountry. Many other uses for engine tuning, racing, sports, etc. * Seamlessly integrates weather data, GPS and your phone's onboard barometer to quickly and accurately calculate your density altitude, altimeter setting, relative air density, and more. * Takes humidity into account in all calculations, making it more accurate than the typical dry bulb approximation formula used by AWOS/ASOS, etc. * Works anywhere. Great without cellular connection as well, which makes it all the more useful in the backcountry and far away from ASOS/AWOS stations. * Location Search: Find atmospheric data (Density Altitude, etc.) at any point on Earth, from anywhere! Data Sensed and Calculated (all calculated with humidity): * Density Altitude * GPS Altitude * Temperature * Altimeter Setting * Absolute Pressure * Dew Point * Relative Humidity * Specific Humidity (grains/pound) * Air Density * Relative Air Density (RAD) * Dyno Correction The quickest way to get your Density Altitude! On the iPhone 6/6+ and newer iPads, it will use the built-in barometer and GPS. If you're in cell range, you don't need to supply any data. If you're out of cell range, all you need to supply is the outside air temperature. Designed not to need an internet connection, so it will work anytime and anywhere you need it. Great tool for pilots, drag racers, engine tuners, golfers, or anyone who needs to conveniently find their Density Altitude, Altimeter Setting, Relative Aid Density (RAD), Specific Humidity or Absolute Pressure. No ads or in-app purchases. We love feedback! Email us at densityaltitude@rateofclimb.com Disclaimer: Density Altitude+ uses available third party weather and elevation data to calculate atmospheric measurements, but Rate Of Climb does not guarantee that the original sources (including the National Weather Service, FAA and others) have provided data that is accurate, complete, timely, or properly formatted. Users should always contact official sources for the most accurate and timely updates. The service is not intended for use in situations in which the failure of the service could lead to death, personal injury, or severe physical or environmental damage. Your use of this application is at your sole risk.

Screenshots

Nav Trainer Pro4 screens
Density Altitude +4 screens

Verdict

The call

The clearest difference is rating: Density Altitude + at 4.8 against Nav Trainer Pro's 3.9. Density Altitude + also leads on price ($3.99 vs $8.99) and ratings volume (1K vs 37). Nav Trainer Pro's advantage is iOS requirement (11.0 vs 13.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Nav Trainer Pro costs $8.99 and Density Altitude + $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Density Altitude + holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Density Altitude + has 1K ratings behind it against 37, so its average is the more settled of the two. Written reviews point the same way: 72% of Nav Trainer Pro's written reviews are positive against 88% of Density Altitude +'s.

UpkeepUpdate frequency

Nav Trainer Pro ships an update every 3 months, Density Altitude + every 4 months. Both last shipped on November 6, 2026.

Scorecard7 real differences · 4 level
Nav Trainer Pro versus Density Altitude +: the parameters behind the verdict, then further details
ParameterNav Trainer ProDensity Altitude +
Price$8.99$3.99 — better
Rating3.9 (37 ratings)4.8 (1K ratings) — better
Positive reviews72.4% of reviews87.5% of reviews — better
Number of ratings371K — better
Update frequencyEvery 3 months — betterEvery 4 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#186#34 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size13 MB4 MB
Age rating4+4+
DeveloperFLEMINGER MEDIA LLCRate Of Climb Industries

Customer experience

Nav Trainer Pro

All ratings37 ratings
Positive73.0%
Neutral5.4%
Negative21.6%
Written reviews145 reviews
Positive72.4%
Neutral10.3%
Negative17.2%

Density Altitude +

All ratings1,028 ratings
Positive97.3%
Neutral1.6%
Negative1.2%
Written reviews24 reviews
Positive87.5%
Neutral4.2%
Negative8.3%

Bugs and requests

Nav Trainer Pro

Not enough reviews yet to summarise bugs or requests.

Density Altitude +

Reported bugs

2 issues
  • GPS elevation doesn't always update reliably
  • No way to set altitude

Requested features

4 requests
  • Apple Watch Widget
  • Barometric pressure
  • Relative humidity for current location
  • Ability to manually enter values

In-app purchases

None

Nav Trainer Pro

No in-app purchases

None

Density Altitude +

No in-app purchases

Questions

Is Nav Trainer Pro free?
Nav Trainer Pro costs $8.99, with no in-app purchases.
Is Density Altitude + free?
Density Altitude + costs $3.99, with no in-app purchases.
Which has better reviews, Nav Trainer Pro or Density Altitude +?
Density Altitude + is rated higher. Nav Trainer Pro averages 3.9 out of 5 from 37 ratings, while Density Altitude + averages 4.8 from 1K ratings.
Do Nav Trainer Pro or Density Altitude + have ads?
Neither Nav Trainer Pro nor Density Altitude + shows ads.
Which is updated more often, Nav Trainer Pro or Density Altitude +?
Nav Trainer Pro ships an update every 3 months, and Density Altitude + every 4 months. Most recently, Nav Trainer Pro was updated on November 6, 2026 and Density Altitude + on November 6, 2026.
Which is more popular, Nav Trainer Pro or Density Altitude +?
Nav Trainer Pro currently peaks at #186 in the App Store charts, and Density Altitude + at #34. Chart position reflects recent download velocity rather than total install base.

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