Comparison

FlightReady E6B vs Stratus Horizon Pro

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

Head to head
About

FlightReady E6B

This aviation utility provides over 100 functions, conversions, and utilities for pilots. It offers accurate calculations for flight planning, performance, navigation, and aerodynamics, surpassing other E6B apps with its comprehensive and precise scientific formulas.

Highlights
  • Over 100 aviation functions
  • Accurate scientific formulas
  • Flight planning calculations
  • Performance metrics
  • Navigation tools
  • Extensive unit conversions
  • Weight & Balance calculations
Currently charting
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FlightReady E6B is a modern flight computer with the most complete set of aviation functions, conversions, and utilities for planning and flying. WHY PILOTS USE FLIGHTREADY E6B • Accurate. Conversions use exact defined factors, and airspeed and altitude calculations use the full U.S. Standard Atmosphere, maintaining accurate calculations above 36,000 feet. • Explained. Every function and conversion has built-in help that describes what it calculates, how to use it, and the formulas and conventions behind it. • Fast. Star the functions you use most to keep them at the top of the main menu, and your favorites sync to your other devices through iCloud. Open functions from Search, Shortcuts, Control Center, the Lock Screen, or the Action button. • Easy to use. Change a field's unit from the menu beside it, and every related field on the screen follows. Results automatically carry over to related functions, reducing repeated data entry. • Night-flight friendly. Dark mode uses a red-shifted amber color scheme designed for use in a dark cockpit. PLAN LEG ▸ Heading & Groundspeed: true heading, groundspeed, and magnetic and compass heading ▸ Time & Distance: leg time, distance, or groundspeed ▸ Required True Airspeed: the true airspeed and heading needed to make a planned groundspeed ▸ Fuel Consumption: fuel required, fuel flow, or endurance ▸ Point of No Return and Equal Time Point, with ETAs AIRSPEED, ALTITUDE, AND WEATHER ▸ Airspeed: actual TAS and Mach, plan Mach, plan TAS, and total air temperature ▸ Altitude: pressure, density, and true altitude ▸ Cloud Base: cloud base AGL and MSL, and relative humidity, from temperature and dew point WIND ▸ Wind Component: headwind and crosswind ▸ Unknown Wind ▸ Wind Correction Angle CLIMB & DESCENT ▸ Climb/Descent Rate: required gradient in ft/nm, percent, and degrees, and rate in ft/min ▸ Top of Descent: determine when to begin descent ▸ Gradient Conversion: percent, degrees, and ft/nm PERFORMANCE ▸ Rate of Turn and Turn Radius for any bank angle and airspeed ▸ Standard Rate Bank Angle and Standard Rate Turn Radius ▸ Hydroplane Speed for rotating and non-rotating tires ▸ Load Factor in Level Turn ▸ Pivotal Altitude, AGL and MSL NAVIGATION ▸ DME Arc Distance ▸ Lead Turn Distance: how far before a fix to start the turn ▸ Thunderstorm Cell Height from radar tilt and distance ▸ Time/Distance to Station from a VOR or NDB bearing change ▸ Holding Pattern: determine entry type and visualize the holding pattern AERODYNAMICS ▸ Lift ▸ Power & Torque WEIGHT & BALANCE ▸ C.G. & Moment: enter any two of weight, CG, and moment to get the third ▸ C.G. Shift: enter any three values to get the fourth, such as how much weight to move ▸ CG % of MAC CONVERSIONS ▸ Temperature: °C, °F, K, and °R ▸ Distance: nautical miles, statute miles, kilometers, feet, and more ▸ Speed: knots, mph, km/h, ft/min, m/s, and 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 ▸ Weight & Mass, Area, Liquid Volume (US and imperial), Volume, Density, Power, and Torque TIME UTILITIES ▸ 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: a countdown that keeps running when you lock your phone, with a notification when time is up SETTINGS ▸ Results to as many as four decimal places ▸ Day, Night, and Auto appearance

About

Stratus Horizon Pro

This app provides a backup Attitude Heading Reference System (AHRS) for pilots, displaying pitch and bank information on a tablet. It also offers radio transcription and playback of air traffic control communications, converting audio to text for easy reference. Firmware updates for compatible devices are also available.

Highlights
  • Backup Attitude Heading Reference System (AHRS)
  • Responsive pitch and bank instrument display
  • Automatic AHRS alignment
  • Radio transcription and playback of ATC communications
  • Visual assist for referencing audio clips
  • Firmware updates for Stratus receivers
  • Day, night, and heads-up display modes
Features
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Backup Glass Cockpit on your iPad Stratus Horizon Pro displays a complete Attitude Heading Reference System (AHRS) for supplemental attitude information in your cockpit. Driven by a Stratus receiver, the AHRS feature will display a super responsive pitch and bank instrument on your iPad. It aligns itself automatically, so you can just turn it on and fly. This provides an excellent backup for emergency situations. Radio Transcription & Playback Plug in and play back. You’ll never have to say “say again” again when you use the radio playback feature. Plug in a Stratus Audio Cable to capture ATC communications for easy one-touch playback. Similar to how visual voicemail works, the ATC communications will be converted into text, providing a visual assist for referencing previous audio clips for playback. This enables pilots to receive a clearance, ATIS, or other important ATC communications without needing to write them down Stratus Audio Cable The Stratus Audio Cable (available to purchase for $49.99 from the Appareo web store) is needed to enable the radio transcription and playback feature. No cellular service or internet connection is required to operate the app. Stratus Device Management Download firmware updates for all models of Stratus portable ADS-B receivers, Stratus 1, 2, 1S, 2S, 2i, 3, 3i, and 4. Switch your Stratus 3 to "Open ADS-B Mode" to utilize its GDL-90 protocol that integrates Stratus with most flight apps. Stratus 4 defaults to GDL-90 mode. Enable notifications to get updates any time there is a firmware update to your portable device. Stratus Horizon Pro is a flight app that can be viewed in day mode, night mode, or via heads-up display. App Multitasking Stratus Horizon Pro supports app multitasking with split view and overlay view, so you can use radio transcription and playback alongside your favorite EFB. The EFB app must be able to support multitasking.

Screenshots

FlightReady E6B4 screens
Stratus Horizon Pro4 screens

Verdict

The call

The clearest difference is price: Stratus Horizon Pro at Free against FlightReady E6B's $9.99. Stratus Horizon Pro also leads on iOS requirement (16 vs 18.1). FlightReady E6B's advantage is rating (4.7 vs 3.8) and review sentiment (83% vs 42%). On update cadence, ads 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

Stratus Horizon Pro is free to download; FlightReady E6B costs $9.99 up front. Stratus Horizon Pro sells 2 in-app purchases, starting at $4.99 per month. FlightReady E6B asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FlightReady E6B holds the better App Store score, 4.7 against 3.8. That said, the two scores are not equally well evidenced: FlightReady E6B has 1.1K ratings behind it against 36, so its average is the more settled of the two. Written reviews point the same way: 83% of FlightReady E6B's written reviews are positive against 42% of Stratus Horizon Pro's.

UpkeepUpdate frequency

FlightReady E6B ships an update every 4 months, Stratus Horizon Pro every 2 months. The most recent releases landed on October 15, 2026 and October 16, 2026 respectively.

Scorecard8 real differences · 3 level
FlightReady E6B versus Stratus Horizon Pro: the parameters behind the verdict, then further details
ParameterFlightReady E6BStratus Horizon Pro
Price$9.99Free — better
Rating4.7 (1.1K ratings) — better3.8 (36 ratings)
Positive reviews83.3% of reviews — better41.7% of reviews
Number of ratings1.1K — better36
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#47 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS18.116 — better
Further details — not scored
Size5 MB287 MB
Age rating4+4+
DeveloperAeroapps TechnologyAppareo Systems, LLC

Customer experience

FlightReady E6B

All ratings1,068 ratings
Positive94.8%
Neutral2.0%
Negative3.3%
Written reviews36 reviews
Positive83.3%
Neutral8.3%
Negative8.3%

Stratus Horizon Pro

All ratings36 ratings
Positive61.1%
Neutral16.7%
Negative22.2%
Written reviews12 reviews
Positive41.7%
Neutral16.7%
Negative41.7%

Bugs and requests

FlightReady E6B

Reported bugs

2 issues
  • Fuel computation functions crashing
  • New extra functions not working

Requested features

3 requests
  • Add wind correction angle calculation
  • Include seconds in time measurements
  • Provide user manual or instructions

Stratus Horizon Pro

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

FlightReady E6B

No in-app purchases

2 purchases

Stratus Horizon Pro

Subscriptions2
  • ATC Transcription - Monthly1 Month trial$4.991 Month
  • ATC Transcription - Yearly1 Month trial$49.991 Year

Questions

Is FlightReady E6B free?
FlightReady E6B costs $9.99, with no in-app purchases.
Is Stratus Horizon Pro free?
Stratus Horizon Pro is free to download, with in-app purchases available.
Which has better reviews, FlightReady E6B or Stratus Horizon Pro?
FlightReady E6B is rated higher. FlightReady E6B averages 4.7 out of 5 from 1.1K ratings, while Stratus Horizon Pro averages 3.8 from 36 ratings.
Do FlightReady E6B or Stratus Horizon Pro have ads?
Neither FlightReady E6B nor Stratus Horizon Pro shows ads.
Which is updated more often, FlightReady E6B or Stratus Horizon Pro?
FlightReady E6B ships an update every 4 months, and Stratus Horizon Pro every 2 months. Most recently, FlightReady E6B was updated on October 15, 2026 and Stratus Horizon Pro on October 16, 2026.

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