# VRflow B737MAX vs 737 Master Caution

The clearest difference is in-app purchases: 737 Master Caution at none against VRflow B737MAX's 1. 737 Master Caution also leads on iOS requirement (13.0 vs 15.0). VRflow B737MAX's advantage is rating (4.7 vs 4.4). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. VRflow B737MAX sells 1 in-app purchase, starting at $19.99 per month. 737 Master Caution asks for nothing beyond the download.

VRflow 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.

VRflow B737MAX ships an update every 4 months, 737 Master Caution every 3 months. The most recent releases landed on September 11, 2026 and September 10, 2026 respectively.

## The numbers

| Metric | VRflow B737MAX | 737 Master Caution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (3 ratings)](https://appshunter.io/ios/app/vrflow-b737max/id6443544971/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 | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Freemium | **Free** |
| Size | 914 MB | 2 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [VRpilot](https://appshunter.io/developer/1549637695) | [Studio BabDreams](https://appshunter.io/developer/431517875) |

## What reviewers say

### VRflow B737MAX

[App page](https://appshunter.io/ios/app/vrflow-b737max/id6443544971)

An interactive cockpit procedure trainer for the B737 MAX, designed to accelerate learning for type ratings, sim checks, and MCC courses. It offers realistic system behavior and multi-crew training scenarios.

**Highlights:** Normal procedures training, Memory items practice, Cockpit exploration mode, Flow visualizations, Multi-crew training (PF/PM roles), Dynamic checklists, Realistic aircraft systems

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| B737MAX monthly subscription | $19.99 | per month |


### 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 VRflow B737MAX free?

VRflow B737MAX 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, VRflow B737MAX or 737 Master Caution?

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

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

Neither VRflow B737MAX nor 737 Master Caution shows ads.

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

VRflow B737MAX ships an update every 4 months, and 737 Master Caution every 3 months. Most recently, VRflow B737MAX was updated on September 11, 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.*