Comparison

CX vs E6B Aviation Calculator

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

Head to head
About

CX

This aviation tool simplifies flight planning for pilots. It offers accurate calculations for time, speed, distance, fuel, and more, along with unit conversions and a built-in calculator. Designed for ease of use, it guides users through flight planning and execution with a natural menu flow.

Highlights
  • Flight planning calculations
  • Time, speed, distance functions
  • Fuel and altitude calculations
  • Unit conversions (12 categories)
  • Weight and balance calculations
  • Holding pattern details
  • Built-in calculator, clock, timer
Currently charting
Read full description

Based on the ASA CX-3® Flight Computer for pilots, this CX-3 app makes flight planning simple by taking confusion out of the equation. Fast, versatile and easy to use, the CX-3® delivers accurate results quickly and efficiently. Whether used for flight planning, ground school, or FAA Knowledge Exam preparation, the menu organization reflects the order in which a flight is normally planned and executed, resulting in a natural flow from one function to the next with a minimum of keystrokes. Multiple aviation functions can be performed on the CX-3® flight computer including those related to time, speed, distance, heading, wind, fuel, altitude, cloud base, standard atmosphere, glide, climb & descent, weight & balance, as well as a holding pattern function to help determine entry method and holding details. The CX-3® has 12 unit-conversions: Distance, Speed, Duration, Temperature, Pressure, Volume, Rate, Weight, Rate of Climb/Descent, Angle of Climb/Descent, Torque, and Angle. These 12 conversion categories contain 38 different conversion factors for over 100 functions. A calculator, clock, timer, and stopwatch are also built in along with multiple settings for lighting, backlighting, themes, time zones and more.

About

E6B Aviation Calculator

This app provides a comprehensive suite of aviation calculators, including E6B functions, ascent/descent planning, fuel calculations, and weight & balance. It supports various unit conversions and offers customizable default units for international users.

Highlights
  • E6B flight calculations
  • Ascent and descent planner
  • Fuel and weight/balance calculator
  • Holding pattern calculations
  • Performance data interpolation
  • Extensive unit conversions
  • Customizable default units
Features
Read full description

Try it for free - upgrade to unlock all flight calculators. You get full access to all 47 aviation functions: E6B - Pressure and density altitudes - True Airspeed, calibrated airspeed, and mach number - Wind correction angle - True heading and compass heading - Crosswind, headwind, and tailwind - Ground speed and flight time - Fuel burn - Cloud base, cloud temperature, and freezing point / altitude Ascent and descent planner Calculate: - Required climb and descent rate in feet / nm - Required vertical speed in feet / minutes - Slope and gradient - Distance to top of climb / from top of descent - Time to climb or descend Fuel Calculator - Convert between imperial and metric units of volume and weight for Avgas and Jet-A: Gallons ↔ Liters ↔ Pounds ↔ Kilograms - Calculate the total endurance given the useable fuel and fuel burn rate. - Calculate total fuel burnt for flight-time Weight & Balance - Quickly and accurately calculate aircraft's CG at ramp, takeoff, landing, and zero-fuel situation Holding Pattern - Visualize entry patterns and calculate wind correction to maintain holding pattern Interpolate - Interpolate up to three columns of performance data tables Convert -14 conversions between imperial and metric units: - Feet ↔ Meters - Inches of mercury ↔ Millibars - Nautical miles ↔ Statute miles ↔ Kilometers - Fahrenheit ↔ Celsius ↔ Kelvins - Gallons ↔ Liters - Pounds ↔ Kilograms Time Calculator - Add (or subtract) time in HH:MM:SS formats. - Convert time between HH:MM:SS and decimal hours, minutes, and seconds. Change default units for international users - Altitude in feet or meters - Barometric pressure in inches of mercury (inHG) or millibars / hectopascals (mb / hPa) - Distances in nautical miles, statute miles, and kilometers - Speed in knots, miles per hour, and kilometers per hour - Temperature in Fahrenheit and celsius - Volume in US gallons and liters - Weight in pounds and kilograms - Center of gravity / arm in inches and meters Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

CX4 screens
E6B Aviation Calculator4 screens

Verdict

The call

The clearest difference is review sentiment: E6B Aviation Calculator at 82% against CX's 36%. E6B Aviation Calculator also leads on price (Free vs $19.99) and rating (4.4 vs 3.7). CX's advantage is in-app purchases (none vs 4) and chart position (#71 vs unranked). On ads, device support and iOS requirement 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

E6B Aviation Calculator is free to download; CX costs $19.99 up front. E6B Aviation Calculator sells 4 in-app purchases, starting at $2.99 per month. CX asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

E6B Aviation Calculator holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 11 and 37 respectively. Written reviews point the same way: 36% of CX's written reviews are positive against 82% of E6B Aviation Calculator's.

UpkeepUpdate frequency

CX ships an update every 8 months, E6B Aviation Calculator every 3 weeks. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

Scorecard8 real differences · 3 level
CX versus E6B Aviation Calculator: the parameters behind the verdict, then further details
ParameterCXE6B Aviation Calculator
Price$19.99Free — better
Rating3.7 (11 ratings)4.4 (37 ratings) — better
Positive reviews35.7% of reviews81.8% of reviews — better
Number of ratings1137 — better
Update frequencyEvery 8 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#71 — better
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.217 — better
Further details — not scored
Size3 MB10 MB
Age rating4+4+
DeveloperASARaj Jeshang

Customer experience

CX

All ratings11 ratings
Positive63.6%
Neutral9.1%
Negative27.3%
Written reviews14 reviews
Positive35.7%
Neutral7.1%
Negative57.1%

E6B Aviation Calculator

All ratings37 ratings
Positive83.8%
Neutral5.4%
Negative10.8%
Written reviews22 reviews
Positive81.8%
Neutral9.1%
Negative9.1%

In-app purchases

None

CX

No in-app purchases

4 purchases

E6B Aviation Calculator

Subscriptions3
  • Full Access$2.991 Month
  • Full Access3 Days trial$2.991 Month
  • Full Access7 Days trial$6.991 Year
One-time1
  • Lifetime Full Access$8.99

Questions

Is CX free?
CX costs $19.99, with no in-app purchases.
Is E6B Aviation Calculator free?
E6B Aviation Calculator is free to download, with in-app purchases available.
Which has better reviews, CX or E6B Aviation Calculator?
E6B Aviation Calculator is rated higher. CX averages 3.7 out of 5 from 11 ratings, while E6B Aviation Calculator averages 4.4 from 37 ratings.
Do CX or E6B Aviation Calculator have ads?
Neither CX nor E6B Aviation Calculator shows ads.
Which is updated more often, CX or E6B Aviation Calculator?
CX ships an update every 8 months, and E6B Aviation Calculator every 3 weeks. Most recently, CX was updated on September 22, 2026 and E6B Aviation Calculator on September 12, 2026.

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