# B737 Performance Handbook vs 737 Master Caution

The clearest difference is rating: B737 Performance Handbook at 5.0 against 737 Master Caution's 4.4. 737 Master Caution's advantage is in-app purchases (none vs 4) and iOS requirement (13.0 vs 15.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. B737 Performance Handbook sells 4 in-app purchases, starting at $4.49 per year. 737 Master Caution asks for nothing beyond the download.

B737 Performance Handbook holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 9 and 7 respectively.

B737 Performance Handbook ships an update every 2 months, 737 Master Caution every 3 months. The most recent releases landed on August 30, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | B737 Performance Handbook | 737 Master Caution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (9 ratings)](https://appshunter.io/ios/app/b737-performance-handbook/id871314271/reviews)** | [4.4 (7 ratings)](https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews) |
| Number of ratings | **9** | 7 |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Monetization | Subscription | **Free** |
| Size | 25 MB | 2 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Maurits Hulshof](https://appshunter.io/developer/1522456315) | [Studio BabDreams](https://appshunter.io/developer/431517875) |

## What reviewers say

### B737 Performance Handbook

[App page](https://appshunter.io/ios/app/b737-performance-handbook/id871314271)

An electronic reference guide for airline pilots and dispatchers, offering tools and comprehensive performance data for Boeing 737 aircraft. It incorporates EASA and FAA regulations with detailed explanations and interactive calculators.

**Highlights:** Landing distance & brake cooling calculator, Go-around gradient & limit weight calculator, Runway condition report decoder, Actual stop margin calculator, Wind components / VREF additive calculator, Interactive V1 adjustment, EASA and FAA edition support, Keyword search and bookmarking

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tools Annual (original users) | $4.49 | per year |
| Member Annual | $13.99 | per year |
| Tools Lifetime (orig. users) | $16.99 | one-time |
| Member Lifetime | $41.99 | one-time |


### 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 B737 Performance Handbook free?

B737 Performance Handbook is free to download, with in-app purchases available.

### Is 737 Master Caution free?

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

### Which has better reviews, B737 Performance Handbook or 737 Master Caution?

B737 Performance Handbook is rated higher. B737 Performance Handbook averages 5.0 out of 5 from 9 ratings, while 737 Master Caution averages 4.4 from 7 ratings.

### Do B737 Performance Handbook or 737 Master Caution have ads?

Neither B737 Performance Handbook nor 737 Master Caution shows ads.

### Which is updated more often, B737 Performance Handbook or 737 Master Caution?

B737 Performance Handbook ships an update every 2 months, and 737 Master Caution every 3 months. Most recently, B737 Performance Handbook was updated on August 30, 2026 and 737 Master Caution on September 10, 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.*