FlightReady E6B
Flight Computer
Aviation functions and utilities for flight planning and flying, including wind, airspeed, altitude, performance, weight and balance, fuel, conversions, and time. Built-in help explains every calculation and how to use it.
- 48+functions for planning and flying
- 4.7 average from 1,000+ App Store ratings
- 36,000+ ftaccurate airspeed and altitude calculations
- iCloudfavorites sync across iPhone and iPad
Accurate results, built-in help, and quick access to every function
Accurate at every altitude
Unit conversions use exact defined factors. Airspeed and altitude calculations use the full U.S. Standard Atmosphere, including the layers above 36,089 feet, so Mach numbers and true altitude remain accurate in the flight levels.
- Exact conversion factors, not rounded approximations
- TAS and Mach, plus pressure, density, and true altitude
- Results shown to as many as four decimal places
Built-in help for every function
Tap the info button on any function or conversion to see what it calculates, how to use it, and the formulas and conventions behind the result.
- What each function calculates and which values to enter
- Assumptions and limits, such as the dew point convergence rate Cloud Base uses
Keep your most-used functions at the top
Star the functions you use most to list them at the top of the main menu, in the order you choose. Favorites sync to your other iPhones and iPads through iCloud.
You can also open any function directly from:
- Search
- Shortcuts
- Control Center
- Lock Screen
- Action button
Change units without leaving the function
Choose a unit from the menu beside a field, and related fields on the same screen change with it, so airspeed and groundspeed always use the same unit. Results carry over to related functions, which reduces repeated data entry.
- Unit menus next to the fields they control
- Reset Units returns a screen to its default units
- Large keypad with a decimal key that follows your region's number format
Made for Night Flying
Night mode uses a red-shifted amber color scheme with no blue or green to help preserve your night vision. Choose Night in Settings, or choose Auto to switch between Day and Night with your device's Light and Dark appearance.
- Applies to every screen, menu, and keypad
- Text follows your device's text size setting
A complete redesign, with new flight planning functions
Version 2.1 adds Holding Pattern. Version 2.0 redesigned every menu and screen, added six new functions, and improved the accuracy of several calculations.
Holding Pattern New in 2.1
Determine entry type and visualize the holding pattern on a compass ring. Drag the aircraft or inbound course to see how the entry changes.
Functions › Navigation
Point of No Return and Equal Time Point
PNR shows how far along the route you can fly and still return with your reserve fuel. ETP shows where continuing and returning take the same time. Each includes an ETA based on your takeoff time.
Functions › Plan LegRequired True Airspeed
Calculates the true airspeed and heading required to achieve a planned groundspeed.
Functions › Plan LegCloud Base
Estimates the base of cumuliform clouds AGL and MSL, and the relative humidity, from the surface temperature and dew point.
FunctionsTime/Distance to Station
Calculates your time and distance to a VOR or NDB by timing a change in bearing.
Functions › NavigationLead Turn Distance
Calculates how far before a fix to begin a standard rate turn so you roll out on the new course.
Functions › NavigationCalculate weight, CG, or moment
C.G. & Moment calculates weight, CG, or moment when the other two are known. C.G. Shift calculates the unknown value when you enter three of its four values.
Weight & BalanceAlso in version 2.0
- Favorites sync across your devices through iCloud
- Open any function from Search, Shortcuts, Control Center, the Lock Screen, or the Action button
- Built-in help for every function and conversion
- The IFR Timer keeps running when your screen is locked and sends a notification when time expires
- The Time Calculator now accepts h:m time, useful for logbook entries
- Airspeed and altitude calculations now use the U.S. Standard Atmosphere above 36,089 feet. Mach, Wind Correction Angle, and fuel density calculations have been corrected.
All Functions and Utilities
Organized by the same menus you will find in the app.
Plan Leg
6 functions- Heading & Groundspeed
True heading and groundspeed, plus magnetic and compass heading
- Time & Distance
Leg time, distance, or groundspeed from the other two
- Required True AirspeedNew
True airspeed and heading required for a planned groundspeed
- Fuel Consumption
Fuel required, fuel flow, or endurance
- Point of No ReturnNew
How far along the route you can fly and still return with reserve fuel, plus ETA
- Equal Time PointNew
Where continuing and returning take the same time, plus ETA
Airspeed, Altitude & Weather
3 functions- Airspeed
Actual and planned TAS and Mach, and total air temperature
- Altitude
Pressure, density, and true altitude
- Cloud BaseNew
Cloud base AGL and MSL and relative humidity from temperature and dew point
Wind
3 functions- Wind Component
Headwind or tailwind and crosswind components for a runway
- Unknown Wind
Wind direction and speed from heading, true airspeed, course, and groundspeed
- Wind Correction Angle
True heading to hold a course in a known wind, and the resulting groundspeed
Climb & Descent
3 functions- Climb/Descent Rate
Required climb or descent gradient in ft/nm, percent, and degrees, and rate in ft/min
- Top of Descent
Where to begin a descent to reach a target altitude at a fix
- Convert Gradient
Converts between percent, degrees, and ft/nm
Performance
7 functions- Rate of Turn
Turn rate in degrees per second for a given bank angle and true airspeed
- Turn Radius
Turn radius for a given bank angle and true airspeed
- Standard Rate Bank Angle
- Standard Rate Turn Radius
- Hydroplane Speed
Groundspeed at which hydroplaning can begin, for rotating and non-rotating tires
- Load Factor in Level Turn
- Pivotal Altitude
Pivotal altitude AGL and MSL for eights on pylons
Navigation
5 functions- DME Arc Distance
Distance flown along a DME arc between two radials
- Lead Turn DistanceNew
Distance before a fix to begin a standard rate turn onto the new course
- Holding PatternNew
Direct, teardrop, or parallel entry for your heading to the fix, drawn on a compass ring
- Thunderstorm Cell Height
Estimated height of a storm cell's radar echo from radar tilt and distance
- Time/Distance to StationNew
Time and distance to a VOR or NDB from a timed bearing change
Aerodynamics
2 functions- Lift
Lift from lift coefficient, wing area, air density, and true airspeed
- Power & Torque
Shaft power from torque and RPM, or torque from power and RPM
Weight & Balance
3 functions- C.G. & Moment
Weight, CG, or moment when the other two are known
- C.G. Shift
Total weight, weight moved, distance moved, or CG change from the other three
- CG % of MAC
CG as a percentage of the mean aerodynamic chord
Conversions
12 functions- Temperature °C, °F, K, °R
- Distance nautical miles, statute miles, kilometers, feet, and more
- Speed knots, mph, km/h, ft/min, m/s, Mach
- Pressure inHg, mbar/hPa, kPa, psi, mmHg, and more
- Fuel @ 15°C gallons, liters, pounds, and kilograms of 100LL, Jet-A, Jet-B, JP-8, and water
- Also Weight & Mass, Density, Area, Liquid Volume (US and imperial), Volume, Power, Torque
Time Utilities
4 functions- Time Calculator
Add, subtract, multiply, and divide times in decimal or formatted time, including h:m
- Flight Log Calculator
Block and flight times from your out, off, on, and in times
- Standard Calculator
- IFR Timer
Countdown timer that keeps running when your screen is locked
More Functions & Conversions
Scroll for more
App Store reviews
Excellent app.
"This is the best aviation calculator from those that I tried so far from the app store. It has a clear and simple user interface with large numeric keyboard, and intuitive menu for selecting functions. It also has a nice selection of functions beyond what you find in a traditional calculator. For example planning of descent rate."
Excellent
"This E6B is among the best I've seen. Besides the normal functions contained on existing e6b's this one actually surpasses the others with available functions and is very easy to use."
Nice
"I've tried most of the others, and this is the best E6B by far. Incredibly easy to use. I like how units can be changed in the function without having to go to the settings."
Frequently Asked Questions
Is it a subscription?
No. FlightReady E6B is a one-time purchase on the App Store, and updates are free.
Does it work without a cell or Wi-Fi connection?
Yes. All calculations run on your iPhone or iPad, so the app works in flight with no connection.
How accurate is it at high altitude?
Airspeed and altitude calculations use the full U.S. Standard Atmosphere, including the layers above 36,089 feet, so Mach and true altitude calculations remain accurate at high altitude.
What is new in version 2.1?
Version 2.1 adds Holding Pattern, which shows whether to fly a direct, teardrop, or parallel entry. Version 2.0 redesigned every screen and added six new functions, favorites with iCloud sync, built-in help for every function, and more accurate high-altitude calculations.
Is there a night mode?
Yes. Night mode uses a red-shifted amber color scheme designed for a dark cockpit. Auto switches between Day and Night to match your device's Light or Dark appearance.
Download FlightReady E6B
Flight computer functions for iPhone and iPad. One-time purchase, no subscription.
