# MGS 400 vs Belimo Display

The clearest difference is ads: Belimo Display at none against MGS 400's shown. Belimo Display also leads on update cadence (every 4 months vs every 17 months) and monetization model (free vs ad-supported). MGS 400's advantage is device support (3 vs 1) and iOS requirement (14.0 vs 16.0). On price, rating, ratings volume and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for MGS 400 against 5.0 for Belimo Display. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

MGS 400 ships an update every 17 months, Belimo Display every 4 months. The most recent releases landed on June 9, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | MGS 400 | Belimo Display |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/mgs-400/id1441402354/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/belimo-display/id1535807783/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 17 months | **Every 4 months** |
| Monetization | Ad-supported | **Free** |
| Size | 16 MB | 8 MB |
| Requires iOS | **14.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MSA - The Safety Company](https://appshunter.io/developer/482957840) | [BELIMO Automation AG](https://appshunter.io/developer/1149281298) |

## 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


### Belimo Display

[App page](https://appshunter.io/ios/app/belimo-display/id1535807783)

This app allows users to view and adjust room sensor values like temperature, humidity, and CO2. It offers an intuitive interface for setpoint adjustments and includes a traffic light function for CO2 levels. Access protection ensures only authorized users can make changes.

**Highlights:** Display room values (temperature, humidity, CO2), Adjust setpoints intuitively, CO2 concentration with traffic light function, Access protection for unauthorized input, Multiple language support

**In-app purchases:** none


## Frequently asked questions

### Is MGS 400 free?

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

### Is Belimo Display free?

Belimo Display is free to download, with no in-app purchases.

### Which has better reviews, MGS 400 or Belimo Display?

MGS 400 and Belimo Display are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do MGS 400 or Belimo Display have ads?

MGS 400 shows ads; Belimo Display does not.

### Which is updated more often, MGS 400 or Belimo Display?

MGS 400 ships an update every 17 months, and Belimo Display every 4 months. Most recently, MGS 400 was updated on June 9, 2026 and Belimo Display on September 16, 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.*