# Prepware Aviation Maintenance vs Part66

The clearest difference is price: Part66 at Free against Prepware Aviation Maintenance's $9.99. Part66 also leads on rating (4.5 vs 3.8) and update cadence (every 2 months vs every 4 months). Prepware Aviation Maintenance's advantage is in-app purchases (none vs 11) and ratings volume (370 vs 10). On review sentiment, ads and device support there is nothing between them.

Part66 is free to download; Prepware Aviation Maintenance costs $9.99 up front. Part66 sells 11 one-off in-app purchases. Prepware Aviation Maintenance asks for nothing beyond the download.

Part66 holds the better App Store score, 4.5 against 3.8. That said, the two scores are not equally well evidenced: Prepware Aviation Maintenance has 370 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 53% of Prepware Aviation Maintenance's written reviews are positive against 60% of Part66's.

Prepware Aviation Maintenance ships an update every 4 months, Part66 every 2 months. The most recent releases landed on October 13, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Prepware Aviation Maintenance | Part66 |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Rating | [3.8 (370 ratings)](https://appshunter.io/ios/app/prepware-aviation-maintenance/id338893931/reviews) | **[4.5 (10 ratings)](https://appshunter.io/ios/app/part66-engineer/id889659306/reviews)** |
| Number of ratings | **370** | 10 |
| Positive reviews | 53.0% of reviews | **60.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free** | Free with in-app purchases |
| Best chart rank | **#7** | — |
| Size | 15 MB | 38 MB |
| Requires iOS | 15.0 | **10.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ASA](https://appshunter.io/developer/334278379) | [DAVID SOUTHERN](https://appshunter.io/developer/889659309) |

## What reviewers say

### Prepware Aviation Maintenance

[App page](https://appshunter.io/ios/app/prepware-aviation-maintenance/id338893931)

**Currently charting:** #7 Top Paid · Education, #63 Top Paid (US App Store)

Prepare for your FAA Knowledge Exam with this comprehensive study and test tool. It offers flashcard-style review of questions, answers, and explanations, allowing you to study by subject or take realistic practice tests.

**Highlights:** FAA Knowledge Exam preparation, Flashcard-style review, Questions, answers, and explanations, Study by subject, Practice tests

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

**In-app purchases:** none

**What reviewers like**

- 🚀 Passed All Three Tests
- 👍 Helpful for A&P Studying
- 💡 Great for Test Prep
- 👍 Useful Tool

**What reviewers complain about**

- 🐛 Grading/Exiting Issues
- 🐛 Outdated Questions
- 🐛 Inconsistent Functionality
- 🐛 Lacking Customization
- 🐛 Difficult Navigation

**Reported bugs**

- Incorrect Answers Marked as Correct
- Grading and Exiting Issues
- Inconsistent Question Formatting Across Platforms
- Lag and Freezing on Newer Devices

**Requested features**

- Randomize Answer Order
- Separate Missed Questions
- Ability to Create Custom Quizzes
- Improved Reporting and Analytics
- Accessibility Improvements for Colorblind Users


### 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 |


## Frequently asked questions

### Is Prepware Aviation Maintenance free?

Prepware Aviation Maintenance costs $9.99, with no in-app purchases.

### Is Part66 free?

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

### Which has better reviews, Prepware Aviation Maintenance or Part66?

Part66 is rated higher. Prepware Aviation Maintenance averages 3.8 out of 5 from 370 ratings, while Part66 averages 4.5 from 10 ratings.

### Do Prepware Aviation Maintenance or Part66 have ads?

Neither Prepware Aviation Maintenance nor Part66 shows ads.

### Which is updated more often, Prepware Aviation Maintenance or Part66?

Prepware Aviation Maintenance ships an update every 4 months, and Part66 every 2 months. Most recently, Prepware Aviation Maintenance was updated on October 13, 2026 and Part66 on September 30, 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.*