# MGS 400 vs Hussmann Controls

The clearest difference is ads: Hussmann Controls at none against MGS 400's shown. On price, update cadence, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

MGS 400 ships an update every 17 months, Hussmann Controls every 10 months. The most recent releases landed on June 9, 2026 and July 23, 2026 respectively.

## The numbers

| Metric | MGS 400 | Hussmann Controls |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mgs-400/id1441402354/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 17 months | **Every 10 months** |
| Monetization | Ad-supported | — |
| Size | 16 MB | 37 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MSA - The Safety Company](https://appshunter.io/developer/482957840) | [Hussmann Corporation](https://appshunter.io/developer/1305933190) |

## What reviewers say

### MGS 400

[App page](https://appshunter.io/ios/app/mgs-400/id1441402354)

This app connects to compatible gas detectors via Bluetooth, simplifying configuration, maintenance, and calibration. It replaces the need for specialized tools and training, ensuring compliance with safety standards.

**Highlights:** Bluetooth connectivity, Device configuration, Alarm threshold adjustment, Maintenance testing, Zero/span calibration, Intuitive interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Hussmann Controls

[App page](https://appshunter.io/ios/app/hussmann-controls/id1501877672)

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

**In-app purchases:** none


## Frequently asked questions

### Is MGS 400 free?

MGS 400 is free to download, with no in-app purchases.

### Is Hussmann Controls free?

Hussmann Controls is free to download, with no in-app purchases.

### Do MGS 400 or Hussmann Controls have ads?

MGS 400 shows ads; Hussmann Controls does not.

### Which is updated more often, MGS 400 or Hussmann Controls?

MGS 400 ships an update every 17 months, and Hussmann Controls every 10 months. Most recently, MGS 400 was updated on June 9, 2026 and Hussmann Controls on July 23, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*