# Boeing 737 vs 737 Master Caution

The clearest difference is price: 737 Master Caution at Free against Boeing 737's $0.99. 737 Master Caution also leads on rating (4.4 vs 2.0) and update cadence (every 3 months vs every 40 months). Boeing 737's advantage is iOS requirement (7.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

737 Master Caution is free to download; Boeing 737 costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

737 Master Caution holds the better App Store score, 4.4 against 2.0. That said, the two scores are not equally well evidenced: 737 Master Caution has 7 ratings behind it against 1, so its average is the more settled of the two.

Boeing 737 ships an update every 40 months, 737 Master Caution every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Boeing 737 | 737 Master Caution |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/boeing-737-400800-study/id991608025/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews)** |
| Number of ratings | 1 | **7** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 40 months | **Every 3 months** |
| Monetization | Paid | **Free** |
| Size | 3 MB | 2 MB |
| Requires iOS | **7.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [ahmet Baydas](https://appshunter.io/developer/589894238) | [Studio BabDreams](https://appshunter.io/developer/431517875) |

## What reviewers say

### Boeing 737

[App page](https://appshunter.io/ios/app/boeing-737-400800-study/id991608025)

This app provides a comprehensive study guide for Boeing 737-400/800 NG aircraft limitations and memory items. It's designed for pilots to easily access and review critical information, serving as a valuable tool during type ratings and for quick study sessions.

**Highlights:** B737/400-900 limitations study, Easy access to information, Quick review tool, Flash card functionality, Covers various aircraft systems

**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 Boeing 737 free?

Boeing 737 costs $0.99, 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, Boeing 737 or 737 Master Caution?

737 Master Caution is rated higher. Boeing 737 averages 2.0 out of 5 from 1 ratings, while 737 Master Caution averages 4.4 from 7 ratings.

### Do Boeing 737 or 737 Master Caution have ads?

Neither Boeing 737 nor 737 Master Caution shows ads.

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

Boeing 737 ships an update every 40 months, and 737 Master Caution every 3 months. Most recently, Boeing 737 was updated on October 26, 2026 and 737 Master Caution on October 24, 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.*