# PLUS+1® Service Tool vs MGS 400

The clearest difference is rating: MGS 400 at 5.0 against PLUS+1® Service Tool's 4.0. PLUS+1® Service Tool's advantage is ads (none vs shown) and update cadence (every 4 months vs every 17 months). On price, ratings volume, 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 holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

PLUS+1® Service Tool ships an update every 4 months, MGS 400 every 17 months. The most recent releases landed on September 14, 2026 and June 9, 2026 respectively.

## The numbers

| Metric | PLUS+1® Service Tool | MGS 400 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (1 ratings)](https://appshunter.io/ios/app/plus-plus-1-service-tool/id1237608220/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mgs-400/id1441402354/reviews)** |
| Number of ratings | 1 | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Every 4 months** | Every 17 months |
| Monetization | **Free** | Ad-supported |
| Size | 57 MB | 16 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Danfoss A/S](https://appshunter.io/developer/423984644) | [MSA - The Safety Company](https://appshunter.io/developer/482957840) |

## What reviewers say

### PLUS+1® Service Tool

[App page](https://appshunter.io/ios/app/plus-plus-1-service-tool/id1237608220)

This tool allows for diagnostics and parameter downloads to electronic components. It connects to controllers for performance logging and tuning, streamlining the development of advanced machinery.

**Highlights:** Perform diagnostics on electronic components, Download applications to controllers, Download parameters to controllers, Log controller performance, Tune controller performance, Accelerate development process

**Features:** macOS Compatibility

**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 PLUS+1® Service Tool free?

PLUS+1® Service Tool 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, PLUS+1® Service Tool or MGS 400?

MGS 400 is rated higher. PLUS+1® Service Tool averages 4.0 out of 5 from 1 ratings, while MGS 400 averages 5.0 from 1 ratings.

### Do PLUS+1® Service Tool or MGS 400 have ads?

MGS 400 shows ads; PLUS+1® Service Tool does not.

### Which is updated more often, PLUS+1® Service Tool or MGS 400?

PLUS+1® Service Tool ships an update every 4 months, and MGS 400 every 17 months. Most recently, PLUS+1® Service Tool was updated on September 14, 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.*