# MGS 400 vs Rileva TE

The clearest difference is ads: Rileva TE at none against MGS 400's shown. Rileva TE also leads on update cadence (every 5 months vs every 17 months). On price, in-app purchases, device support and iOS requirement 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, Rileva TE every 5 months. The most recent releases landed on June 9, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | MGS 400 | Rileva TE |
| --- | --- | --- |
| 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 5 months** |
| Monetization | Ad-supported | — |
| Size | 16 MB | 21 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MSA - The Safety Company](https://appshunter.io/developer/482957840) | [CAREL INDUSTRIES S.p.A.](https://appshunter.io/developer/1797037609) |

## 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


### Rileva TE

[App page](https://appshunter.io/ios/app/rileva-te/id6444776412)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is MGS 400 free?

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

### Is Rileva TE free?

Rileva TE is free to download, with no in-app purchases.

### Do MGS 400 or Rileva TE have ads?

MGS 400 shows ads; Rileva TE does not.

### Which is updated more often, MGS 400 or Rileva TE?

MGS 400 ships an update every 17 months, and Rileva TE every 5 months. Most recently, MGS 400 was updated on June 9, 2026 and Rileva TE on September 13, 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.*