# FlyBy E6B — E6B Flight Computer for pilots

> Comprehensive flight computer for pilots with over 70 aviation calculation functions. (iPhone/iPad app by Lonnie Ganz.)

- Source: https://appshunter.io/ios/app/flyby-e6b/id377624983 (this page in markdown: same URL + `.md`)
- Developer: [Lonnie Ganz](https://appshunter.io/developer/377624986)
- Category: Navigation, Weather
- Price: $9.99
- Rating: 4.70/5 from 17 App Store ratings · 93 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.6 · 33 MB
- Languages: American English
- Released: 2010-06-21
- Data updated: 2026-09-08
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/flyby-e6b/id377624983/reviews.md

## What is FlyBy E6B?

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.

## Key features

- Airspeed calculations
- Wind direction and speed
- Heading and ground speed
- Time-speed-distance calculations
- Altitude calculations
- Vertical navigation
- Navigation calculations
- Unit conversions

## Recent user reviews (10 of 93)

All indexed reviews: https://appshunter.io/ios/app/flyby-e6b/id377624983/reviews.md

### 5/5 — Excellent app for new and experienced aviators

*2026-05-11, version 2026.1*

I have used this app for many years and am still discovering new uses for it (like crew rest). I am a B737 Captain and my son will be starting his flight training soon.  I’ll make sure this app is on his phone. Thank you Captain Lonnie.

### 5/5 — Worth the money

*2026-03-06, version 2025.31*

I purchased this app on recommendation of another pilot and my favourite feature is the flight time/air time calculator. Worth the money alone for that to speed up post flight time calculations and more importantly accuracy when you’re tired from a long day of flying many legs. Perhaps there’s other free apps that can do that but this includes so much more.

### 5/5 — Best E6B I have ever used

*2025-12-17, version 2025.31*

The latest update with the Digital ATIS feature lets me check the airport active runway and RSC before I go to work. The ability to save cold weather correction approaches is super handy for last minute runway changes. 

This is by far the best/easiest electronic E6B I have ever used. It’s intuitive and very well laid out. I have been using this app for over 15 years and it just keeps getting better and better. The developer keeps upgrading and adding features on a regular basis. This is truly the best addition to my flight bag and well worth the money.

### 5/5 — Must have.

*2025-01-03, version 2024.16*

Great App and a must have for pilots!

### 5/5 — Good app

*2024-12-22, version 2024.16*

Please add snowtam decoder and JETA1 computations that would be great

### 5/5 — Nice simple app that works

*2024-12-18, version 2024.16*

Love this app, so simple, no extras, it doesn’t keep growing or try to do more and more. Still happy with it many years later!

### 5/5 — Oceanic Navigation Re Clearance | Circle to Land Turn Radius

*2023-01-07, version 2023.3.6*

(Validate the magnetic course and distance between waypoints). FlyBy E6B provides initial outbound magnetic course, midpoint magnetic course, inbound magnetic course, variation, and distance.  Information required on Master Document oceanic cross check annotations.  Circle to Land.  KIAS to KTAS, angle of bank limited, and critical to know radius of turn calculation.  These values are key in evaluating if you can safely circle at any airport irrespective of meeting the basic Jeppesen chart limitations. FlyBy E6B is incredibly your student pilot first time flight calculator that will advance with your career to long range oceanic remote FAR Part 25 Turbo Jet Operations.  Even more impressive Lonnie Ganz the creator of this program is responsive and available to customer needs.  A passionate and always driven to improve aviation professional.

### 5/5 — Best E6B

*2022-06-19, version 3.12*

This app contains EVERYTHING you need to fly safely. I’d recommend this to absolutely anyone who flies.

### 5/5 — Exceptional App

*2018-09-17, version 2.81*

I am an experimental test pilot with Bombardier Learjet. I use Lonnie’s app frequently for test mission planning and execution. It is reliable and thorough. Highly recommended.

### 5/5 — Best E6B I have ever used

*2017-12-08, version 2.78*

This is by far the best/easiest electronic E6B I have ever used. It’s intuitive and very well laid out. I have been using this app for over 7 years and it just keeps getting better and better. The developer keeps upgrading and adding features on a regular basis. This is truly the best addition to my flight bag and well worth the money.

## Frequently asked questions about FlyBy E6B

### What does the FlyBy E6B app do?

The FlyBy E6B app is a comprehensive flight computer designed for pilots. It offers over 70 different calculation functions essential for flight planning and in-flight navigation, covering areas like airspeed, wind, time-speed-distance, altitude, and vertical navigation.

### What are the key features of FlyBy E6B?

Key features include detailed airspeed calculations, wind component finding, heading and ground speed determination, extensive time-speed-distance computations, various altitude calculations (density, pressure, true), vertical navigation tools like SCDA and VDP, and advanced navigation functions like critical point and equal time point calculations. It also includes a wide range of unit conversions.

### How much does FlyBy E6B cost?

Based on the provided information, the app is a paid application. There are no mentions of in-app purchases or a subscription model, indicating a one-time purchase for full access to its features.

### What kind of pilots is this app for?

This app is an essential tool for all pilots, whether they are just starting their aviation career or are seasoned professionals. Its extensive features are designed to be useful in every aircraft a pilot might fly.

### Can this app help with navigation?

Yes, the app includes robust navigation calculation features. This includes calculating track and distance between two points with map plotting, a map GPS mode displaying real-time flight information, a feature to find the closest airport, and various other navigational aids like DME arcs and VOR navigation.

## Version history (last 5 releases)

### 2026.1 — 2026-05-05

- Added Developer Updates
- Set Airspeed Recovery Default to 1.

### 2025.31 — 2025-12-12

Journey Log Time function improved.

### 2025.30 — 2025-11-27

- Weather module completely new under the hood. Now has Digital ATIS access for US and Canadian airports.
- Added Decoded weather page.
- Minor bugs (but not the real kind) squashed.

### 2025.22 — 2025-09-25

Minor layout fixes for Liquid Glass.

### 2025.21 — 2025-09-22

- NOAA METAR and TAF Weather server address change.
- Removed Decoded Wx page.
- Some iPhone iOS v26.0 interface adjustments.

## Apps similar to FlyBy E6B

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Pilot: Aviation Altimeter](https://appshunter.io/ios/app/pilot-aviation-altimeter/id1469731805) | 4.7 (180) | Free | Navigation |
| [NaviGuard](https://appshunter.io/ios/app/naviguard/id6475402907) | 5.0 (2) | Free | Navigation |
| [PFMA E6B](https://appshunter.io/ios/app/pfma-e6b/id323662975) | 4.4 (11) | $6.99 | Navigation |
| [uvGO](https://appshunter.io/ios/app/uvgo/id1009578990) | 4.3 (72) | Free | Navigation |
| [Scott IPC](https://appshunter.io/ios/app/scott-ipc/id1336528269) | 5.0 (18) | Free | Navigation |
| [AeroAltitude](https://appshunter.io/ios/app/aeroaltitude/id1186339144) | 4.8 (5) | $2.29 | Navigation |

## More apps by Lonnie Ganz

- [Q Code](https://appshunter.io/ios/app/q-code/id415059756)
- [FlyBy Nav](https://appshunter.io/ios/app/flyby-nav/id442859816)
- [Pressure Altimeter](https://appshunter.io/ios/app/pressure-altimeter/id929307651)

All apps by Lonnie Ganz: https://appshunter.io/developer/377624986

## Related topics

[fly by](https://appshunter.io/ios/topics/fly-by)

---

*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-08.*