# VRflow DA40 vs 737 Master Caution

The clearest difference is rating: 737 Master Caution at 4.4 against VRflow DA40's 3.7. 737 Master Caution also leads on in-app purchases (none vs 1) and update cadence (every 3 months vs every 9 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. VRflow DA40 sells 1 in-app purchase, starting at $11.99 per month. 737 Master Caution asks for nothing beyond the download.

737 Master Caution holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 3 and 7 respectively.

VRflow DA40 ships an update every 9 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 DA40 | 737 Master Caution |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (3 ratings)](https://appshunter.io/ios/app/vrflow-da40/id6444026708/reviews) | **[4.4 (7 ratings)](https://appshunter.io/ios/app/737-master-caution/id6455042070/reviews)** |
| Number of ratings | 3 | **7** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 3 months** |
| Monetization | Freemium | **Free** |
| Size | 780 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 DA40

[App page](https://appshunter.io/ios/app/vrflow-da40/id6444026708)

An interactive cockpit procedure trainer for the DA40 NG aircraft. It offers step-by-step explanations, dynamic checklists, and realistic system behavior to enhance pilot training and knowledge retention. Explore the cockpit interactively and prepare for flights or check rides.

**Highlights:** Interactive cockpit procedure training, Normal and emergency procedure modules, Cockpit familiarization/Explore Mode, Dynamic checklists and explanations, Realistic aircraft systems simulation, Training and Exam Modes

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DA40 monthly subscription | $11.99 | 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 DA40 free?

VRflow DA40 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 DA40 or 737 Master Caution?

737 Master Caution is rated higher. VRflow DA40 averages 3.7 out of 5 from 3 ratings, while 737 Master Caution averages 4.4 from 7 ratings.

### Do VRflow DA40 or 737 Master Caution have ads?

Neither VRflow DA40 nor 737 Master Caution shows ads.

### Which is updated more often, VRflow DA40 or 737 Master Caution?

VRflow DA40 ships an update every 9 months, and 737 Master Caution every 3 months. Most recently, VRflow DA40 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.*