Comparison

iFly EFB 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

iFly EFB

This app provides pilots with essential flight information in an easy-to-use format for both VFR and IFR flying. It offers advanced navigation features, real-time weather, and safety alerts to enhance situational awareness and simplify flight planning.

Highlights
  • Geo-Reference Approach Plates & Airport Diagrams
  • 3D Synthetic Vision / EFIS Mode
  • Terrain, Obstructions, Traffic, Airspace Alerts
  • ADS-B Support
  • AutoTaxi+ for Safe Taxing
  • RealView Airport Imagery
  • Complete VFR & IFR Databases and Charts
Features
Read full description

iFly EFB delivers the perfect combination of affordability, capability, and usability for both VFR and IFR Pilots. Safely and quickly get the information you need so you can focus on flying! Key reasons to try iFly EFB: 1) Ease of use in the cockpit: Our intuitive and simple interface, easy to hit buttons, simple map gestures, large fonts, and more make this the best EFB for in-flight use 2) Pilot focused company: We have staff (pilots) on the ground at our office in Texas waiting to answer your questions. Call 214-585-0444 or email support@adventurepilot.com, we're here to help 3) Price: We are one of the most competitively priced EFBs on the market 4) Capabilities: We are one of the most capable EFBs on the market! Need proof? Visit www.iFlyEFB.com/Compare Following are some of our features and benefits: •Geo-Reference Approach Plates and Airport Diagrams •3D Synthetic Vision / EFIS Mode •Terrain, Obstructions, Traffic, and Airspaces Alerts •Complete ADSB support •AutoTaxi+ for safe taxing at any airport •RealView airport imagery •RealPlan automatic VFR Planner •Auto-load approach into plan •Complete VFR and IFR databases and charts (FAA) •Sectionals •Customizable Instruments •Public & Private Airports •Winds aloft including forecasts for 36 hours •Hi/Lo-Enroute Charts •Terminal Area Charts(TAC) •World Aeronautical Charts(WAC) •Vector Mode •Weather (Pre-Flight or ADS-B Live) •Hi-res Winds Aloft Optimizing •Rapid Flight planning •Plates & Diagrams (Approach, Departure Plates, Stars, SIDs Airport Diagrams) •Instruments Panel •Day/Night Mode •Online Flight Plan Filing •Custom Instrument Layouts (24 Instruments, e.g. HSI, Vertical Profile, and AHRS) •Vertical Terrain planning and Airspace preview •Find Nearest •History •North Up / Track Up •Pinch Zooming w/ One Touch Feature •Dynamic Distance Ring •Hybrid Compass Rose w/ Nav Function •Extended Course Line •Flight Trails •Past Flights •Rubber Band route modification •Custom Aircraft icons •AutoTaxi+ •Alerts & Warnings •Button Fading (maximizes screen space) •Custom User Waypoints •Customizable Instruments •Simulator Mode

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

iFly EFB4 screens
Density Altitude +4 screens

Verdict

The call

The clearest difference is price: iFly EFB at Free against Density Altitude +'s $3.99. iFly EFB also leads on update cadence (every 3 weeks vs every 4 months). Density Altitude +'s advantage is in-app purchases (none vs 8) and chart position (#30 vs unranked). On rating, review sentiment, ratings volume and ads 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

iFly EFB is free to download; Density Altitude + costs $3.99 up front. iFly EFB sells 8 one-off in-app purchases. Density Altitude + asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for iFly EFB against 4.8 for Density Altitude +. Both are backed by a comparable volume of ratings — 353 and 1K respectively. Written reviews are what separate them: 90% of iFly EFB's written reviews are positive against 88% of Density Altitude +'s.

UpkeepUpdate frequency

iFly EFB ships an update every 3 weeks, Density Altitude + every 4 months. The most recent releases landed on October 12, 2026 and October 16, 2026 respectively.

Scorecard5 real differences · 6 level
iFly EFB versus Density Altitude +: the parameters behind the verdict, then further details
ParameteriFly EFBDensity Altitude +
PriceFree — better$3.99
Rating4.7 (353 ratings)4.8 (1K ratings) — better
Positive reviews89.9% of reviews — better87.5% of reviews
Number of ratings3531K — better
Update frequencyEvery 3 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
Best chart rank—#30 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size107 MB4 MB
Age rating4+4+
DeveloperAdventure Pilot, LLCRate Of Climb Industries

Customer experience

iFly EFB

All ratings353 ratings
Positive93.8%
Neutral2.3%
Negative4.0%
Written reviews99 reviews
Positive89.9%
Neutral1.0%
Negative9.1%

Density Altitude +

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

User reviews

iFly EFB

From 353 App Store ratings

What we love

  • 👍 Extremely intuitive and easy to use interface
  • 💰 Very affordable pricing compared to competitors
  • 🎨 Highly customizable instrument layouts and display
  • 📊 Excellent flight planning capabilities
  • 🗺️ Clear, sharp, high-resolution maps and charts

Room to improve

  • 🐛 App occasionally locks up and requires restart
  • 📍 Inaccurate and outdated FBO information
  • 🗺️ Limited international/Canadian map coverage
  • 🎨 Dated user interface design (1990s aesthetic)
  • 📡 GPS connectivity issues on iPad iOS 18+

Density Altitude +

From 1K App Store ratings

What we love

  • 🚀 Great app for simplicity and ease of use
  • 🔒 No data collected from the app
  • 👍 Accurate and consistent
  • 👍 Excellent for car racing
  • 👍 Provides increased satellite accuracy

Room to improve

  • 🐛 GPS elevation doesn't always update reliably
  • 🔧 Can't manually change location

Bugs and requests

iFly EFB

Reported bugs

8 issues
  • App freezes when navigating between menus
  • Settings not saved after app lock
  • GPS weak signal and satellite lock issues on iOS 18+
  • Terrain loading delays during scrolling
  • Compatibility issues with some external GPS devices (Dual 150)
Show 3 more
  • Crashes during early versions (now resolved)
  • iPhone X screen resolution not fully optimized
  • Glitchy behavior with some ADS-B connections

Requested features

15 requests
  • Logbook functionality
  • Sunset/sunrise times display
  • One-button night mode
  • Annotation tools for approach plates
  • Scratch pad for ATC notes
Show 10 more
  • Pilot-entered fuel stop updates (like Waze model)
  • Mo-gas location database
  • Global map coverage beyond USA and Bahamas
  • Seamless chart display
  • Landscape mode support
  • Apple Watch companion app
  • Ability to submit e-APIS details from app
  • 10-year subscription option at discounted rate
  • Better sketching tools
  • Improved FBO information database

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

8 purchases

iFly EFB

One-time8
  • iPad Add-On Subscription (1 Year)$24.99
  • IFR iPad Subscription Upgrade (1 Year)$49.99
  • VFR iPad Subscription (1 Year)$79.99
Show 5 more
  • Base VFR Subscription$94.99
  • VFR/MP Subscription$124.99
  • VFR+IFR iPad Subscription (1 Year)$129.99
  • VFR/IFR Subscription$149.99
  • VFR/IFR/MP Subscription$179.99
None

Density Altitude +

No in-app purchases

Questions

Is iFly EFB free?
iFly EFB is free to download, with in-app purchases available.
Is Density Altitude + free?
Density Altitude + costs $3.99, with no in-app purchases.
Which has better reviews, iFly EFB or Density Altitude +?
Density Altitude + is rated higher. iFly EFB averages 4.7 out of 5 from 353 ratings, while Density Altitude + averages 4.8 from 1K ratings.
Do iFly EFB or Density Altitude + have ads?
Neither iFly EFB nor Density Altitude + shows ads.
Which is updated more often, iFly EFB or Density Altitude +?
iFly EFB ships an update every 3 weeks, and Density Altitude + every 4 months. Most recently, iFly EFB was updated on October 12, 2026 and Density Altitude + on October 16, 2026.

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