Comparison

SiteService vs MGS 400

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

SiteService

This application allows service technicians to remotely connect to Danfoss control systems. It provides a live view of plant status, alarms, historical data, and device settings, simplifying common service tasks with an intuitive interface.

Highlights
  • Remote connection to Danfoss control systems
  • Live plant status visualization
  • Alarm management and history
  • Device settings and parameter access
  • Manual control of systems
  • Address book for site connections
Features
Read full description

Danfoss A/S, a world leader in food retail refrigeration and air conditioning controls, presents the Danfoss SiteService App. As the name suggests, the SiteService App offers the Service Technician the ability to remotely connect to a Danfoss controls system. Once authorized, the Technician gains a full visualization of a live plant status, alarms, history graphs and device settings. Built from the ground up, the SiteService App is designed to simplify some of the common service oriented tasks by providing a simple yet powerful interface to the most common areas of the Danfoss controls system. Features -Supporting Danfoss AK-SC 255, AK-SC 355, AK-SM 800 series controllers -Address book for easy site connections -Live plant status (Refrigeration/HVAC/Lighting/Energy/Miscellaneous points) -Device details (Refrigeration/HVAC/Lighting/ Energy /Miscellaneous points) -Read/write parameter access (Refrigeration/HVAC/Lighting/ Energy /Miscellaneous points) -Manual control (Refrigeration/HVAC.Lighting) -Alarm management (view current alarms, acknowledge alarms, acknowledged list, cleared list) -History graphs

About

MGS 400

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
Read full description

The Bacharach MGS-400 App allows users to configure, maintain and interface with compatible MGS-400 gas detectors. Once a Bluetooth connection has been established, the app replaces the need for specialty training/tools and makes compliance with safety standards (ASHRAE 15, EN 378) easy and effective. Features include: - Configuration (Rename device, define alarm thresholds, adjust Modbus settings, configure relay behavior and manage analog output settings.) - Maintenance (Test LED/buzzer function, relays, and analog output level.) - Calibration (View sensor type, serial number and “Calibration Due” timer and initiate zero / span calibrations with customizable field calibration certificate.) - Intuitive Interface (View current gas measurement and acknowledge alarm / fault status.)

Screenshots

SiteService4 screens
MGS 4004 screens

Verdict

The call

SiteService and MGS 400 both sit at 4.9 stars, but that hides the real split: 100% of MGS 400's written reviews are positive against 30% of SiteService's. SiteService's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, rating, update cadence and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.9 for SiteService against 5.0 for MGS 400. That said, the two scores are not equally well evidenced: SiteService has 7 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 30% of SiteService's written reviews are positive against 100% of MGS 400's.

UpkeepUpdate frequency

SiteService ships an update every 32 months, MGS 400 every 17 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
SiteService versus MGS 400: the parameters behind the verdict, then further details
ParameterSiteServiceMGS 400
PriceFreeFree
Rating4.9 (7 ratings)5.0 (1 ratings) — better
Positive reviews30.0% of reviews100.0% of reviews — better
Number of ratings7 — better1
Update frequencyEvery 32 monthsEvery 17 months — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree — betterAd-supported
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better14.0
Further details — not scored
Size73 MB16 MB
Age rating4+4+
DeveloperDanfoss A/SMSA - The Safety Company

Customer experience

SiteService

All ratings7 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive30.0%
Neutral0.0%
Negative70.0%

MGS 400

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

SiteService

No in-app purchases

None

MGS 400

No in-app purchases

Questions

Is SiteService free?
SiteService 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, SiteService or MGS 400?
MGS 400 is rated higher. SiteService averages 4.9 out of 5 from 7 ratings, while MGS 400 averages 5.0 from 1 ratings.
Do SiteService or MGS 400 have ads?
MGS 400 shows ads; SiteService does not.
Which is updated more often, SiteService or MGS 400?
SiteService ships an update every 32 months, and MGS 400 every 17 months. Most recently, SiteService was updated on November 6, 2026 and MGS 400 on November 2, 2026.

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