Comparison

FlyBy E6B vs SkyGuardTWX

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

Head to head
About

FlyBy E6B

This aviation tool provides pilots with over 70 essential flight calculations, including airspeed, wind, navigation, and altitude computations. It offers advanced features for both aspiring and experienced aviators, with a long history of user feedback and development.

Highlights
  • Airspeed calculations
  • Wind direction and speed
  • Heading and ground speed
  • Time-speed-distance calculations
  • Altitude calculations
  • Vertical navigation
  • Navigation calculations
  • Unit conversions
Features
Currently charting
Read full description

FlyBy E6B is an essential application for all pilots. Designed by a professional airline pilot it includes many features not found in the "other" E6B programs. If you are considering a career in aviation FlyBy E6B has functions that you can use in every aircraft you will fly. FlyBy E6B was one of the very first applications of its kind published for the Palm Pilot. Used by thousands of pilots the world over, it has evolved from the suggestions and feedback we have received. Please visit our web site for more detail and screen shots. FlyBy E6B Features (70+): Airspeed Calculations: - True Airspeed using Calibrated Airspeed - True Airspeed using Mach# - Calibrated Airspeed using TAS - IAS Using MACH# - Equivalent Airspeed using CAS - Mach# Using TAS - Mach Crossover Altitude - Planned MACH# - Planned TAS - Vref CAS Wind Calculation: - Find Wind Direction and Speed - Find Wind Component (headwind and crosswind) Heading and Ground Speed: - Find Heading, Ground Speed, ETE and Fuel Burned Time-Speed-Distance: - Find Estimated Time Enroute - Find Ground Speed - Find Distance - Find Fuel Time - Find Fuel Flow - Find Fuel Burned - Find Estimated Time of Arrival - Journey Log Time - Time Adder - Fixed GroundSpeed (Find a True Airspeed given a track, wind and required groundspeed) - Crew Rest Altitude Calculations: - Density Altitude - Pressure Altitude - True Altitude - Cold Temperature Altitude Correction - China RVSM Airspace - Device Altitude (If device has pressure sensor) Vertical Navigation Calculations: - Distance and Time using Altitude Change, Ground Speed, Vertical Speed - Rate of Descent using Altitude Change, Ground Speed, Distance - Rate of Descent using Altitude Change, Ground Speed, Descent Angle - Feet/Nm using Vertical Speed, Ground Speed - Feet/Nm (%) using Gradient %, Ground Speed - Rate of Climb using Required Climb Gradient and Ground Speed - SCDA (Constant Descent Angle) - VDP (Visual Descent Point) - VPA Deviation (Vertical Path Angle Deviation) Navigation Calculations: - Critical Point - Equal Time Point - Point of No Return - Time to Minimum Descent Altitude - Track and Distance between two points with map plotting of the great circle track. Map plotting includes movable pin locations with instant trip information: Distance, Track and time enroute. - Map GPS mode. Displays device Speed, True Course, Altitude, Distance Remaining, Track to Destination, cross track error, estimated time remaining and estimated time of arrival. - Map closest airport feature will display airports close to your current GPS location or a dropped pin location. - Fix. Calculate a map point based on a Fix, Radial and Distance. - Rate One Turn - Radius of Turn - Turning Stall Speed - DME Arc distance and time - VOR Nav Conversions: - Distance: Nautical Miles/ Knots Statute Miles/ Mph Kilometers/ Kph Feet Meters Meters/Second Feet/Second Feet/Minute - Volume: US Gallons Imperial Gallons Liters - Temperature: Celsius Fahrenheit Kelvin - Weight: Pounds Kilograms - Altimeter: Inches Hg Millibars/Hectopascals mmHg - Fuel, Temperature Corrected, JetA, JetB, AvGas: US Gallons Imperial Gallons Liters Pounds Kilograms - QFE/QNH airfield altitude conversion - DMS/DM.m/DM.m and D.d coordinate conversion - VNAV Gradient% Feet per NM Angle Weather: - Relative Humidity, Heat Index, Cumulus cloud base, Wind Chill - NOAA METAR/TAF and D-ATIS access - ISA Temperature Deviation Other Functions: - Linear Interpolation - Minimum Floor Load Limit (Cargo) - Maximum Cargo Weight - Runway Slope - PAX Weight - C.G. Change - Weight to Shift - Distance to Shift - Sunrise/Sunset: Civil Day/Night, Azimuth, Apex, Elevation, for any location and time/date. Includes a unique sunset ETA function that calculates your current flights sunset time.

About

SkyGuardTWX

This companion tool wirelessly configures a UAT ADS-B Transceiver. It allows setup of parameters like N-Number, ICAO code, and flight plan squawk. Advanced models enable real-time squawk code and pressure altitude display.

Highlights
  • Wireless transceiver configuration
  • N-Number setup
  • Transponder ICAO code setting
  • Flight Plan/Squawk code management
  • Manual squawk code changes (Vision-Pro)
  • Real-time squawk code display (Vision-Pro Plus)
  • Pressure altitude display (Vision-Pro Plus)
Features
Read full description

This app is a companion tool for use with the SkyGuardTWX UAT ADS-B Transceiver. It allows wireless configuration of all required setup parameters such as N-Number, Transponder ICAO code, and Flight Plan/Squawk code. The app is capable of manually changing aircraft squawk codes as issued by ATC while in flight if you have the Vision-Pro model of the SkyGuardTWX UAT Transceiver. Version 2.0.7 and greater is capable of displaying realtime squawk code and pressure altitude as acquired from your Mode C Transponder as long as you have a Vision-Pro Plus Model of the SkyGuardTWX UAT Transceiver.

Screenshots

FlyBy E6B4 screens
SkyGuardTWX1 screens

Verdict

The call

The clearest difference is price: SkyGuardTWX at Free against FlyBy E6B's $9.99. SkyGuardTWX also leads on rating (5.0 vs 4.7) and iOS requirement (11.0 vs 16.6). FlyBy E6B's advantage is chart position (#44 vs unranked) and ratings volume (17 vs 2). 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

SkyGuardTWX is free to download; FlyBy E6B costs $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SkyGuardTWX holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: FlyBy E6B has 17 ratings behind it against 2, so its average is the more settled of the two.

UpkeepUpdate frequency

FlyBy E6B ships an update every 2 months, SkyGuardTWX every 3 months. The most recent releases landed on September 30, 2026 and September 18, 2026 respectively.

Scorecard6 real differences · 5 level
FlyBy E6B versus SkyGuardTWX: the parameters behind the verdict, then further details
ParameterFlyBy E6BSkyGuardTWX
Price$9.99Free — better
Rating4.7 (17 ratings)5.0 (2 ratings) — better
Positive reviews94.6% of reviews—
Number of ratings17 — better2
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#44 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.611.0 — better
Further details — not scored
Size33 MB8 MB
Age rating4+4+
DeveloperLonnie GanzSkyGuardTWX LLC

Customer experience

FlyBy E6B

All ratings17 ratings
Positive94.1%
Neutral5.9%
Negative0.0%
Written reviews93 reviews
Positive94.6%
Neutral3.2%
Negative2.2%

SkyGuardTWX

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

FlyBy E6B

No in-app purchases

None

SkyGuardTWX

No in-app purchases

Questions

Is FlyBy E6B free?
FlyBy E6B costs $9.99, with no in-app purchases.
Is SkyGuardTWX free?
SkyGuardTWX is free to download, with no in-app purchases.
Which has better reviews, FlyBy E6B or SkyGuardTWX?
SkyGuardTWX is rated higher. FlyBy E6B averages 4.7 out of 5 from 17 ratings, while SkyGuardTWX averages 5.0 from 2 ratings.
Do FlyBy E6B or SkyGuardTWX have ads?
Neither FlyBy E6B nor SkyGuardTWX shows ads.
Which is updated more often, FlyBy E6B or SkyGuardTWX?
FlyBy E6B ships an update every 2 months, and SkyGuardTWX every 3 months. Most recently, FlyBy E6B was updated on September 30, 2026 and SkyGuardTWX on September 18, 2026.

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