# BITZER Electronics ServiceTool vs MGS 400

The clearest difference is rating: MGS 400 at 5.0 against BITZER Electronics ServiceTool's 3.0. BITZER Electronics ServiceTool's advantage is ads (none vs shown) and update cadence (every 3 months vs every 17 months). On price, review sentiment, 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.

MGS 400 holds the better App Store score, 5.0 against 3.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

BITZER Electronics ServiceTool ships an update every 3 months, MGS 400 every 17 months. The most recent releases landed on September 24, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | BITZER Electronics ServiceTool | MGS 400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (2 ratings)](https://appshunter.io/ios/app/bitzer-electronics-servicetool/id1437610638/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mgs-400/id1441402354/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 17 months |
| Monetization | **Free** | Ad-supported |
| Size | 248 MB | 16 MB |
| Requires iOS | 15.0 | **14.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [BITZER SE](https://appshunter.io/developer/1224090796) | [MSA - The Safety Company](https://appshunter.io/developer/482957840) |

## What reviewers say

### BITZER Electronics ServiceTool

[App page](https://appshunter.io/ios/app/bitzer-electronics-servicetool/id1437610638)

This application allows for Bluetooth connectivity to specific BITZER IQ products. Users can configure devices, monitor operations, view alarms with help texts, and retrieve logs for visualization and cloud upload.

**Highlights:** Bluetooth connectivity, Device configuration, Operation monitoring, Alarm viewing with help texts, Log retrieval and visualization, Cloud upload for logs

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

**In-app purchases:** none


### 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


## Frequently asked questions

### Is BITZER Electronics ServiceTool free?

BITZER Electronics ServiceTool is free to download, with no in-app purchases.

### Is MGS 400 free?

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

### Which has better reviews, BITZER Electronics ServiceTool or MGS 400?

MGS 400 is rated higher. BITZER Electronics ServiceTool averages 3.0 out of 5 from 2 ratings, while MGS 400 averages 5.0 from 1 ratings.

### Do BITZER Electronics ServiceTool or MGS 400 have ads?

MGS 400 shows ads; BITZER Electronics ServiceTool does not.

### Which is updated more often, BITZER Electronics ServiceTool or MGS 400?

BITZER Electronics ServiceTool ships an update every 3 months, and MGS 400 every 17 months. Most recently, BITZER Electronics ServiceTool was updated on September 24, 2026 and MGS 400 on June 9, 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.*