Comparison

MRLDS 400 vs FireAlarmGuy

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

Head to head
About

MRLDS 400

Features
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The Copeland MRLDS 400 App allows users to configure, maintain and interface with compatible MRLDS-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.)

About

FireAlarmGuy

This utility app provides two essential tools for fire alarm technicians. It features a calculator for determining DMX dip switch settings and a decoder for understanding battery manufacturing date codes, streamlining fieldwork.

Highlights
  • DMX Dip Switch Calculator
  • Battery Date Code Decoder
  • Device addressing assistance
  • Battery production date lookup
  • Fieldwork simplification
Read full description

FireAlarmGuy is the ultimate tool for fire alarm technicians, combining two essential features in one app: DMX Dip Switch Calculator – Instantly find the correct dip switch positions for device addressing. Just enter the address, and get the right settings in seconds. Battery Date Code Decoder – Quickly decode manufacturing date codes for sealed lead-acid (SLA) batteries. Enter the code to determine the production date. Built by a fire alarm tech, for fire alarm techs, FireAlarmGuy makes fieldwork faster and easier. Download now and simplify your job!

Screenshots

MRLDS 4003 screens
FireAlarmGuy3 screens

Verdict

The call

The clearest difference is update cadence: FireAlarmGuy at monthly against MRLDS 400's every 5 months. MRLDS 400's advantage is iOS requirement (14.0 vs 16.4). On price, ads, in-app purchases and device support 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.

UpkeepUpdate frequency

MRLDS 400 ships an update every 5 months, FireAlarmGuy monthly. The most recent releases landed on September 28, 2026 and October 28, 2026 respectively.

Scorecard2 real differences · 8 level
MRLDS 400 versus FireAlarmGuy: the parameters behind the verdict, then further details
ParameterMRLDS 400FireAlarmGuy
PriceFreeFree
Rating—5.0 (7 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—7 — better
Update frequencyEvery 5 monthsMonthly — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.4
Further details — not scored
Size8 MB35 MB
Age rating4+4+
DeveloperCopeland LPJack Dalton

In-app purchases

None

MRLDS 400

No in-app purchases

None

FireAlarmGuy

No in-app purchases

Questions

Is MRLDS 400 free?
MRLDS 400 is free to download, with no in-app purchases.
Is FireAlarmGuy free?
FireAlarmGuy is free to download, with no in-app purchases.
Do MRLDS 400 or FireAlarmGuy have ads?
Neither MRLDS 400 nor FireAlarmGuy shows ads.
Which is updated more often, MRLDS 400 or FireAlarmGuy?
MRLDS 400 ships an update every 5 months, and FireAlarmGuy monthly. Most recently, MRLDS 400 was updated on September 28, 2026 and FireAlarmGuy on October 28, 2026.

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