# iTrain B737MAX vs 737 Master Caution

The clearest difference is price: 737 Master Caution at Free against iTrain B737MAX's $17.99. 737 Master Caution also leads on iOS requirement (13.0 vs 18.6). iTrain B737MAX's advantage is rating (4.7 vs 4.4) and update cadence (every 5 weeks vs every 3 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

737 Master Caution is free to download; iTrain B737MAX costs $17.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iTrain B737MAX holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

iTrain B737MAX ships an update every 5 weeks, 737 Master Caution every 3 months. The most recent releases landed on October 10, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | iTrain B737MAX | 737 Master Caution |
| --- | --- | --- |
| Price | $17.99 | **Free** |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/itrain-b737max/id1320615389/reviews)** | [4.4 (7 ratings)](https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews) |
| Number of ratings | 3 | **7** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Paid | **Free** |
| Size | 14 MB | 2 MB |
| Requires iOS | 18.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Flighttrainer Aviation Apps B.V.](https://appshunter.io/developer/1529841212) | [Studio BabDreams](https://appshunter.io/developer/431517875) |

## What reviewers say

### iTrain B737MAX

[App page](https://appshunter.io/ios/app/itrain-b737max/id1320615389)

Expand your technical knowledge of the Boeing B737MAX with over 800 questions. This app helps you train memory items, system knowledge, and maneuvers to prepare for interviews, grading, or exams. Its interface is designed for focused learning for both experienced and trainee pilots.

**Highlights:** Boeing B737MAX technical knowledge expansion, NNC memory items training, System knowledge and flightpath patterns, Non-normal maneuvers preparation, Over 800 technical questions, Automated database updates

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

**In-app purchases:** none


### 737 Master Caution

[App page](https://appshunter.io/ios/app/737-master-caution/id6455042070)

This app provides a comprehensive reference for over 200 warning lights and messages across B737 Classic, NG, and MAX aircraft families. It includes tools for abbreviations, FMC messages, circuit breakers, and electrical buses, aiding pilot training and aviation enthusiasts.

**Highlights:** References over 200 B737 warning lights and messages, Filter by aircraft family (Classic, NG, MAX), Full text search for specific lights, Personal notes and bookmarking, Reference tools for abbreviations, FMC messages, circuit breakers, and electrical buses

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

**In-app purchases:** none


## Frequently asked questions

### Is iTrain B737MAX free?

iTrain B737MAX costs $17.99, with no in-app purchases.

### Is 737 Master Caution free?

737 Master Caution is free to download, with no in-app purchases.

### Which has better reviews, iTrain B737MAX or 737 Master Caution?

iTrain B737MAX is rated higher. iTrain B737MAX averages 4.7 out of 5 from 3 ratings, while 737 Master Caution averages 4.4 from 7 ratings.

### Do iTrain B737MAX or 737 Master Caution have ads?

Neither iTrain B737MAX nor 737 Master Caution shows ads.

### Which is updated more often, iTrain B737MAX or 737 Master Caution?

iTrain B737MAX ships an update every 5 weeks, and 737 Master Caution every 3 months. Most recently, iTrain B737MAX was updated on October 10, 2026 and 737 Master Caution on October 15, 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.*