Part66 vs 737 Handbook
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
737 Handbook
An interactive technical guide for pilots, offering quick reference for sim or interview preparation. Features interactive schematics, photos, videos, and a flight deck mock-up. Content is organized for flexible learning, from essential information to in-depth system exploration.
- Interactive schematics
- Videos of malfunctions and systems
- FMC simulator with CPDLC/ACARS
- 737 Flight Deck Mock-up
- Photo galleries
- Offline content access
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The 737 Handbook is an interactive technical guide for pilots which provides a quick reference for sim or interview preparation from initial type rating to command upgrade. The app features interactive schematics, photos and videos with unique content. The information is sorted in different levels from most essential information on the page to in-depth information in pop-up windows. This enables you to choose the way you want to learn. Should you require quick reference you can go through the main text in the chapter. Should you, however, wish to explore the systems more in-depth you can do so by opening different pop-up windows, text and playing around with fully interactive schematics. Try it out yourself! Main features: * 226 pages divided into 18 chapters * Over 20 videos of different engine malfunctions and various systems operation * FMC simulator with CPDLC and ACARS * Fully Interactive schematics including Electrical, Fuel, Air Systems and many more * 737 Flight Deck Mock-up * Photo galleries * News section with technical blog posts * All of the content is available offline when online the app checks for content updates Note: The 737 Handbook comes with one chapter and one interactive schematic for free. The rest of the content is available as one time in-app purchase. ——————————————————————————— Terms & Conditions In-App Purchases * The 737 Handbook application offers an “in-app” purchase option which will unlock features listed on the “Unlock Premium Access” page * The “in-app” purchase is valid only on the ecosystem where the “in-app” purchase was made (no cross-platform support) * The “in-app” purchase will unlock premium access on all devices within the ecosystem, provided that the devices are signed in under the same ID * All amounts are payable and charged: * (i) for career pass (lifetime subscription) at the time you place your order * (ii) for type rating pass (6 monthly subscription), at the beginning of the subscription and, because each such subscription renews automatically for an additional period equal in length to the expiring subscription term until you cancel it, at the time of each renewal until you cancel. * You must cancel your subscription before it renews to avoid the billing of the fees for the next subscription period * Your subscription will automatically renew unless auto-renew is turned off at least 24-hours before the end of the current subscription period. * Your account will be charged for renewal within 24-hours prior to the end of the current subscription period. Automatic renewals will cost the same price you were originally charged for the subscription * You can manage your subscriptions and turn off auto-renewal by going to your Account Settings on the App Store after purchase. * You can cancel the renewal of your subscription with the App Store * You will not receive a refund for the fees you already paid for your current subscription period, and you will continue to use premium access until the end of your current subscription period * App Store subscriptions can be managed from a mobile device or computer that is signed in using the same Apple ID as the initial purchase. The 737 Publishing s.r.o. cannot manage App Store subscriptions. * By purchasing the “premium access” you accept these terms & conditions Full Terms and Conditions: https://737-handbook.s3.us-east-1.amazonaws.com/Terms+and+Conditions.pdf Privacy Policy: https://737-handbook.s3.us-east-1.amazonaws.com/Privacy+Policy.pdf
Screenshots
Verdict
The clearest difference is review sentiment: 737 Handbook at 87% against Part66's 60%. 737 Handbook also leads on rating (4.8 vs 4.5) and ratings volume (246 vs 10). Part66's advantage is iOS requirement (10.3 vs 16.4). On price, ads, in-app purchases and monetization model 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
Both are free to download. Part66 sells 11 one-off in-app purchases and 737 Handbook sells 2 in-app purchases, starting at $16.99 per 6 months. Whichever you choose, the download price is not the number that matters.
737 Handbook holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: 737 Handbook has 246 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 60% of Part66's written reviews are positive against 87% of 737 Handbook's.
Part66 ships an update every 2 months, 737 Handbook every 3 weeks. The most recent releases landed on September 30, 2026 and October 16, 2026 respectively.
| Parameter | Part66 | 737 Handbook |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (10 ratings) | 4.8 (246 ratings) — better |
| Positive reviews | 60.0% of reviews | 87.4% of reviews — better |
| Number of ratings | 10 | 246 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.3 — better | 16.4 |
| Further details — not scored | ||
| Size | 38 MB | 51 MB |
| Age rating | 4+ | 4+ |
| Developer | DAVID SOUTHERN | 737 PUBLISHING S.R.O. |
Customer experience
Part66
737 Handbook
Bugs and requests
Part66
Not enough reviews yet to summarise bugs or requests.
737 Handbook
Reported bugs
7 issues- App doesn't work offline
- Stuck at loading percentages (e.g., 56%, 57%)
- Premium content not available after purchase
- App fails to start after updates
- App not working on iOS 12.5.5
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- App crashes often
- Interactive components are very sensitive to touch
Requested features
6 requests- Make app available offline
- Improve interactive component intuitiveness
- Develop app for other aircraft models (e.g., 777)
- Add feature to highlight words and make in-app notes
- Consider sales/discounts on the app
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- Develop an app for maintenance engineers
In-app purchases
Part66
- Module 10 Exam 2$0.99
- module 10 Exam 3$0.99
- Module 15 Exam 2$0.99
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- 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
737 Handbook
- Type Rating Pass (6-monthly)$16.996 Months
- Career Pass (Lifetime)$54.99
Questions
Is Part66 free?
Is 737 Handbook free?
Which has better reviews, Part66 or 737 Handbook?
Do Part66 or 737 Handbook have ads?
Which is updated more often, Part66 or 737 Handbook?
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