MRLDS 400 vs FireAlarmGuy
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MRLDS 400
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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.)
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.
- DMX Dip Switch Calculator
- Battery Date Code Decoder
- Device addressing assistance
- Battery production date lookup
- Fieldwork simplification
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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
Verdict
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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MRLDS 400 ships an update every 5 months, FireAlarmGuy monthly. The most recent releases landed on September 28, 2026 and October 28, 2026 respectively.
| Parameter | MRLDS 400 | FireAlarmGuy |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (7 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 7 — better |
| Update frequency | Every 5 months | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 8 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Copeland LP | Jack Dalton |
In-app purchases
MRLDS 400
No in-app purchases
FireAlarmGuy
No in-app purchases
Questions
Is MRLDS 400 free?
Is FireAlarmGuy free?
Do MRLDS 400 or FireAlarmGuy have ads?
Which is updated more often, MRLDS 400 or FireAlarmGuy?
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