Comparison

FAA ATP Written Test Prep vs Flight Test X20

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

Head to head
About

FAA ATP Written Test Prep

Prepare for FAA Airline Transport Pilot and Aircraft Dispatcher written exams with a comprehensive database of current questions and detailed explanations. Study actual FAA questions and ace your tests with flexible study modes and up-to-date content.

Highlights
  • Actual FAA questions
  • Up-to-date content with free updates
  • Detailed, illustrated explanations
  • Compatible with FAA ACS
  • Flexible study modes
  • Covers ATP and ADX tests
Features
Read full description

Spend less time studying and more time flying! This is the FAA Airline Transport Pilot (ATP Part 121, ATP Part 135, and Helicopter) and Aircraft Dispatcher (ADX) version of GroundSchool, our FAA knowledge (written) test preparation featuring up-to-date questions, free updates, and illustrated explanations written by a professional team of pilot examiners and instructors. GroundSchool is fully compatible with FAA ACS (Airman Certification Standards) and our editorial team is working to keep it so as ACS continues to evolve. Don't be fooled by imitators! Competing apps here in the AppStore use only the limited set of questions that the FAA publicly releases via its website - that is not enough to adequately prepare you for your test! Our GroundSchool app, on the other hand, features a much more comprehensive database (typically about 2-4 times the size of the demo FAA public one) of actual and current FAA questions that you likely can and will be asked on the actual test! This along with our detailed, professional explanations and easy to use interface are major reasons why pilots have come to trust GroundSchool. Study actual, up-to-date FAA questions and then ACE your FAA ATP written test the easy way with GroundSchool FAA Knowledge Test Preparation software by Dauntless Aviation, the trusted leader in FAA written test preparation. Features: * Actual FAA Questions Current and Valid for Right Now. As soon as you install the software, use the 'update' feature and the software will connect to our servers, grab the latest questions, images, figures, and explanation content, and you'll be good to go. * Detailed Explanations written by an experienced editorial team of examiner and instructor pilots. * All Charts and Figures Included * Several flexible study modes - fits the way you want to study! * Compatible with all FAA "ground school" classroom-based courses This ATP/ADX version of GroundSchool will prepare you for any or all of the following tests: * ATP - Airline Transport Pilot Airplane (Part 121) * ATA - Airline Transport Pilot Airplane (135) * ATH - Airline Transport Pilot Helicopter (135) * ADX - Aircraft Dispatcher * ARA - Airline Transport Pilot Airplane (135) (added rating) * ARH - Airline Transport Pilot Helicopter (135) (added rating) * Canadian Airline Transport Pilot to USA FAA Conversion With Dauntless Aviation's GroundSchool, you don't need to worry: * Our material is UP TO DATE. No matter what date is listed here in regarding the 'Release date', this date refers to the program itself only. Once you get the program on your device, use the built-in update feature and it will connect to our servers and download the latest and greatest version of the test prep content and our explanations that we have available. To learn more about this, please visit our website. * We pride ourselves on the quality of our explanations. This is not some idle boast - our explanations are more detailed and more illustrated than that of ANY other FAA knowledge test provider, period. * Tens of thousands of people have used our products to prepare for their FAA knowledge tests. Ours is a system that works. ATP 121 or 135? Some airplane pilots are not sure whether they should take the Part 121 or the Part 135 tests. In short, from the FAA's perspective, it doesn't matter - study for the one that is most interesting to you and perhaps the one that you envision as most relevant to your future career. for a more detailed description of this, please see our website. Remember, this software allows you to study both 121 and 135 and jump between them (and the other ATP tests) as you'd like with no restrictions. Good luck on your test!

About

Flight Test X20

Prepare for FAA knowledge tests with this comprehensive study platform. It offers top-off preparation for various pilot and aviation professional written exams, including instrument rating and ATP.

Highlights
  • FAA knowledge test preparation
  • Pilot study course
  • Dispatcher study course
  • Instrument rating preparation
  • Instructor written test prep
  • ATP written test prep
Read full description

Flight Test X20 is Sheppard Air's latest student study course learning platform for FAA knowledge tests. It allows those students studying for pilot, dispatcher, instrument rating, instructor, flight engineer, ATP, and interviewee written tests to do their top-off preparation for the final knowledge test.

Screenshots

FAA ATP Written Test Prep4 screens

Verdict

The call

The clearest difference is price: Flight Test X20 at Free against FAA ATP Written Test Prep's $79.99. Flight Test X20 also leads on in-app purchases (none vs 1) and ratings volume (96 vs 19). FAA ATP Written Test Prep's advantage is rating (4.5 vs 3.9) and review sentiment (74% vs 60%). On update cadence and ads 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

Flight Test X20 is free to download; FAA ATP Written Test Prep costs $79.99 up front. FAA ATP Written Test Prep sells 1 one-off in-app purchase. Flight Test X20 asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

FAA ATP Written Test Prep holds the better App Store score, 4.5 against 3.9. That said, the two scores are not equally well evidenced: Flight Test X20 has 96 ratings behind it against 19, so its average is the more settled of the two. Written reviews point the same way: 74% of FAA ATP Written Test Prep's written reviews are positive against 60% of Flight Test X20's.

UpkeepUpdate frequency

FAA ATP Written Test Prep ships an update monthly, Flight Test X20 every 5 weeks. Both last shipped on October 24, 2026.

Scorecard8 real differences · 2 level
FAA ATP Written Test Prep versus Flight Test X20: the parameters behind the verdict, then further details
ParameterFAA ATP Written Test PrepFlight Test X20
Price$79.99Free — better
Rating4.5 (19 ratings) — better3.9 (96 ratings)
Positive reviews73.9% of reviews — better60.0% of reviews
Number of ratings1996 — better
Update frequencyMonthly — betterEvery 5 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS9.0 — better14.0
Further details — not scored
Size705 MB25 MB
Age rating4+4+
DeveloperDauntless SoftwareSheppard Air, Inc.

Customer experience

FAA ATP Written Test Prep

All ratings19 ratings
Positive89.5%
Neutral0.0%
Negative10.5%
Written reviews46 reviews
Positive73.9%
Neutral4.3%
Negative21.7%

Flight Test X20

All ratings93 ratings
Positive67.7%
Neutral8.6%
Negative23.7%
Written reviews45 reviews
Positive60.0%
Neutral13.3%
Negative26.7%

In-app purchases

1 purchases

FAA ATP Written Test Prep

One-time1
  • Audio Review$18.99
None

Flight Test X20

No in-app purchases

Questions

Is FAA ATP Written Test Prep free?
FAA ATP Written Test Prep costs $79.99, and also offers in-app purchases.
Is Flight Test X20 free?
Flight Test X20 is free to download, with no in-app purchases.
Which has better reviews, FAA ATP Written Test Prep or Flight Test X20?
FAA ATP Written Test Prep is rated higher. FAA ATP Written Test Prep averages 4.5 out of 5 from 19 ratings, while Flight Test X20 averages 3.9 from 96 ratings.
Do FAA ATP Written Test Prep or Flight Test X20 have ads?
Neither FAA ATP Written Test Prep nor Flight Test X20 shows ads.
Which is updated more often, FAA ATP Written Test Prep or Flight Test X20?
FAA ATP Written Test Prep ships an update monthly, and Flight Test X20 every 5 weeks. Most recently, FAA ATP Written Test Prep was updated on October 24, 2026 and Flight Test X20 on October 24, 2026.

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