Comparison

Part66 vs A320 CFDS Trainer Lite

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

Head to head
About

Part66

Prepare for EASA Part 66 aircraft maintenance license exams with sample tests and flashcards. Generate unlimited random exams and analyze results to identify weak areas. Covers modules relevant to B1.1 and potentially FAA licenses.

Highlights
  • Sample exams for EASA Part 66 modules
  • Flashcards for purchased modules
  • Unlimited random exam generation
  • Exam timer with real-world time limits
  • Analysis of results and weak point identification
  • Email results for review
Features
Read full description

Part66-Engineer app is for prospective aircraft engineers who are studying for their EASA Part 66 basic maintenance licence; the app offers a full range of sample exams from Module 1 to Module 17 specifically tailored to meet the B1.1 licence. As of Version 3.0(24/11/2018); Module 7, Module 8, Module 9, Module 10, Module 15 and Module 17 have exams and flashcards available for purchase. Flashcards are now added for all the completed modules (7,8,9,10,15 & 17). Many questions are also similar to the FAR Part-65 standard for those engineers applying for their FAA license. Exams will be available for all modules in upcoming releases. Version 3.0 includes the option to download a question and flashcard bank and the user can generate unlimited random exams from the available questions. Each exam is set to the same standard as a 'real' EASA Part-147 supplied exam. Exam timer shows the real world time available for each exam and no questions are repeated. The user is able to email and analyze their results. The app will highlight weak points and give a suggested reading. Total questions available in this app = 5,472 questions. Total questions available per Module for this version: Module 1 = 32 Module 2 = 52 Module 3 = 52 Module 4 = 20 Module 5 = 50 Module 6 = 72 Module 7 = 844 questions & 780 flashcards. Module 8 = 239 questions & 170 flashcards. Module 9 = 290 questions & 242 flashcards. Module 10 = 426 questions & 304 flashcards. Module 11 = 140 Module 15 = 665 questions & 480 flashcards. Module 17 = 443 questions & 171 flashcards.

About

A320 CFDS Trainer Lite

Master the A320 Centralized Fault Display System with this mobile maintenance training app. Practice fault reporting, navigate menus, and access reference pages from related systems. Designed by aviation experts for professionals, it offers offline functionality and an ad-free experience.

Highlights
  • Practice PFR creation
  • Navigate CFDS menus
  • Access Normal and Menu Modes
  • View static reference pages
  • Offline functionality
  • Ad-free learning
Features
Read full description

A320 CFDS Maintenance Trainer Lite Master the A320 Centralized Fault Display System directly from your mobile device with this specialized maintenance training app. Designed by aviation maintenance experts for maintenance professionals, this app delivers an authentic learning experience of core CFDS functions. Not intended for pilot training. KEY FEATURES: - Practice PFR (Post Flight Report) creation with and without faults - Navigate CFDS menus and submenus - Access both Normal and Menu Modes - View static reference pages from related systems (FMS, ATSU, AIDS) - Optimized performance for older hardware - 100% ad-free learning experience - Full offline functionality Developed by ERM SIMS, specialists in aviation maintenance training simulations, this Lite version provides essential A320 CFDS navigation training in a user-friendly interface. FMS and other system pages are static view-only references to help maintenance personnel explore system relationships. Check out our Full version offering expanded capabilities and enhanced features. Disclaimer: This application serves as a reference tool only and does not replace official maintenance manuals, which remain the primary information source. Variations may exist due to different A320 configuration options.

Screenshots

Part664 screens
A320 CFDS Trainer Lite4 screens

Verdict

The call

The clearest difference is review sentiment: Part66 at 60% against A320 CFDS Trainer Lite's 25%. Part66 also leads on iOS requirement (10.3 vs 13.0). A320 CFDS Trainer Lite's advantage is in-app purchases (none vs 11). On price, 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

Both are free to download. Part66 sells 11 one-off in-app purchases. A320 CFDS Trainer Lite asks for nothing beyond the download.

UpkeepUpdate frequency

Part66 ships an update every 2 months, A320 CFDS Trainer Lite every 3 months. The most recent releases landed on September 30, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 6 level
Part66 versus A320 CFDS Trainer Lite: the parameters behind the verdict, then further details
ParameterPart66A320 CFDS Trainer Lite
PriceFreeFree
Rating4.5 (10 ratings) — better—
Positive reviews60.0% of reviews — better25.0% of reviews
Number of ratings10 — better—
Update frequencyEvery 2 months — betterEvery 3 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS10.3 — better13.0
Further details — not scored
Size38 MB69 MB
Age rating4+4+
DeveloperDAVID SOUTHERNERM SIMS LLC

Customer experience

Part66

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews5 reviews
Positive60.0%
Neutral20.0%
Negative20.0%

A320 CFDS Trainer Lite

Written reviews4 reviews
Positive25.0%
Neutral0.0%
Negative75.0%

In-app purchases

11 purchases

Part66

One-time11
  • Module 10 Exam 2$0.99
  • module 10 Exam 3$0.99
  • Module 15 Exam 2$0.99
Show 8 more
  • Module 7 Exam 2$0.99
  • Module 8 Exam 2$0.99
  • Module 8 Exam 3$0.99
  • Module 8 Bank = 409 Questions.$7.99
  • Module 17 Full Bank = 614 Q$8.99
  • Module 10 Bank. 730 Questions.$10.99
  • Module 15 Full Bank = 1,129 Q$11.99
  • Module 7 Bank = 1,624 Question$11.99
None

A320 CFDS Trainer Lite

No in-app purchases

Questions

Is Part66 free?
Part66 is free to download, with in-app purchases available.
Is A320 CFDS Trainer Lite free?
A320 CFDS Trainer Lite is free to download, with no in-app purchases.
Do Part66 or A320 CFDS Trainer Lite have ads?
Neither Part66 nor A320 CFDS Trainer Lite shows ads.
Which is updated more often, Part66 or A320 CFDS Trainer Lite?
Part66 ships an update every 2 months, and A320 CFDS Trainer Lite every 3 months. Most recently, Part66 was updated on September 30, 2026 and A320 CFDS Trainer Lite on September 26, 2026.

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