# Part66 vs 737 Handbook

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.

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.

## The numbers

| Metric | Part66 | 737 Handbook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (10 ratings)](https://appshunter.io/ios/app/part66-engineer/id889659306/reviews) | **[4.8 (246 ratings)](https://appshunter.io/ios/app/737-handbook/id1482597031/reviews)** |
| Number of ratings | 10 | **246** |
| Positive reviews | 60.0% of reviews | **87.4% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 38 MB | 51 MB |
| Requires iOS | **10.3** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DAVID SOUTHERN](https://appshunter.io/developer/889659309) | [737 PUBLISHING S.R.O.](https://appshunter.io/developer/1496630252) |

## What reviewers say

### Part66

[App page](https://appshunter.io/ios/app/part66-engineer/id889659306)

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:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Module 10 Exam 2 | $0.99 | one-time |
| module 10 Exam 3 | $0.99 | one-time |
| Module 15 Exam 2 | $0.99 | one-time |
| Module 7 Exam 2 | $0.99 | one-time |
| Module 8 Exam 2 | $0.99 | one-time |
| Module 8 Exam 3 | $0.99 | one-time |
| Module 8 Bank = 409 Questions. | $7.99 | one-time |
| Module 17 Full Bank = 614 Q | $8.99 | one-time |
| Module 10 Bank. 730 Questions. | $10.99 | one-time |
| Module 15 Full Bank = 1,129 Q | $11.99 | one-time |
| Module 7 Bank = 1,624 Question | $11.99 | one-time |


### 737 Handbook

[App page](https://appshunter.io/ios/app/737-handbook/id1482597031)

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.

**Highlights:** Interactive schematics, Videos of malfunctions and systems, FMC simulator with CPDLC/ACARS, 737 Flight Deck Mock-up, Photo galleries, Offline content access

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Type Rating Pass (6-monthly) | $16.99 | per 6 months |
| Career Pass (Lifetime) | $54.99 | one-time |

**What reviewers like**

- 👍 Very informative and well-presented
- 👍 Excellent for learning and reference
- 👍 Great diagrams and visuals
- 👍 Helpful for pilots and trainees
- 👍 Worth the investment/cost

**What reviewers complain about**

- 🐛 App doesn't work offline
- 🐛 Sensitive/unintuitive touch controls
- 🐛 Expensive for what it offers
- 🐛 Crashes frequently
- 🐛 Slow loading times/stuck at percentages

**Reported bugs**

- 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

**Requested features**

- 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


## Frequently asked questions

### Is Part66 free?

Part66 is free to download, with in-app purchases available.

### Is 737 Handbook free?

737 Handbook is free to download, with in-app purchases available.

### Which has better reviews, Part66 or 737 Handbook?

737 Handbook is rated higher. Part66 averages 4.5 out of 5 from 10 ratings, while 737 Handbook averages 4.8 from 246 ratings.

### Do Part66 or 737 Handbook have ads?

Neither Part66 nor 737 Handbook shows ads.

### Which is updated more often, Part66 or 737 Handbook?

Part66 ships an update every 2 months, and 737 Handbook every 3 weeks. Most recently, Part66 was updated on September 30, 2026 and 737 Handbook on October 16, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*