# GreenLight Scanner vs FireAlarmGuy

GreenLight Scanner and FireAlarmGuy both sit at 5.0 stars, but that hides the real split: 100% of FireAlarmGuy's written reviews are positive against 50% of GreenLight Scanner's. FireAlarmGuy also leads on update cadence (every 2 weeks vs every 5 weeks). GreenLight Scanner's advantage is ratings volume (10 vs 2). On price, rating, ads 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.

On the App Store both sit at effectively the same score — 5.0 for GreenLight Scanner against 5.0 for FireAlarmGuy. That said, the two scores are not equally well evidenced: GreenLight Scanner has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews are what separate them: 50% of GreenLight Scanner's written reviews are positive against 100% of FireAlarmGuy's.

GreenLight Scanner ships an update every 5 weeks, FireAlarmGuy every 2 weeks. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | GreenLight Scanner | FireAlarmGuy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (10 ratings)](https://appshunter.io/ios/app/greenlight-scanner/id1495178299/reviews) | [5.0 (2 ratings)](https://appshunter.io/ios/app/firealarmguy/id6742727065/reviews) |
| Number of ratings | **10** | 2 |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 43 MB | 15 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [GreenLight IoT, Inc.](https://appshunter.io/developer/1455879587) | [Jack Dalton](https://appshunter.io/developer/1799610315) |

## What reviewers say

### GreenLight Scanner

[App page](https://appshunter.io/ios/app/greenlight-scanner/id1495178299)

This tool streamlines field documentation for networked devices by enabling fast, accurate collection of asset address data via barcode scanning. It syncs directly to design documents and a cloud-based registry, providing real-time installation progress and simplifying punch list management.

**Highlights:** Barcode scanning for asset data, Real-time sync with asset registry, Automated as-built documentation, Punch list management, Streamlined IoT deployments, Reduced commissioning time

**In-app purchases:** none


### FireAlarmGuy

[App page](https://appshunter.io/ios/app/firealarmguy/id6742727065)

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

**In-app purchases:** none


## Frequently asked questions

### Is GreenLight Scanner free?

GreenLight Scanner is free to download, with no in-app purchases.

### Is FireAlarmGuy free?

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

### Which has better reviews, GreenLight Scanner or FireAlarmGuy?

GreenLight Scanner and FireAlarmGuy are both rated 5.0 out of 5 on the App Store, from 10 and 2 ratings respectively.

### Do GreenLight Scanner or FireAlarmGuy have ads?

Neither GreenLight Scanner nor FireAlarmGuy shows ads.

### Which is updated more often, GreenLight Scanner or FireAlarmGuy?

GreenLight Scanner ships an update every 5 weeks, and FireAlarmGuy every 2 weeks. Most recently, GreenLight Scanner was updated on October 10, 2026 and FireAlarmGuy on October 11, 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.*