HazChem vs Decon Field Guide
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
HazChem
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This app will allow you to decode the HazChem plates Emergency Action Code found on vehicles or containers. This app is for the purpose of curiosity only and should not be relied upon during an emergency.
Decon Field Guide
This reference app provides quick and efficient decontamination methods for hundreds of threats. It features a classic Threat Index, pictorial instructions, and an in-app dwell timer to guide users through mission execution. Designed for approved users, it aims to make anyone an instant decontamination expert.
- Threat Index for decontamination methods
- Pictorial instructions
- In-app dwell timer
- Covers hundreds of threats
- Designed for approved users
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Imagine decontamination in the palm of your hand. Introducing the all-new, redesigned Decon Field Guide. Using the same classic Threat Index, quickly and efficiently determine proper decontamination methods for hundreds of known and emerging threats and execute your mission flawlessly utilizing pictorial instructions and in-app dwell timer. Become an instant decontamination expert with the Decon Field Guide. Only available for approved users. Download now.
Screenshots
Verdict
The clearest difference is update cadence: Decon Field Guide at every 2 months against HazChem's every 17 months. Decon Field Guide also leads on iOS requirement (15.1 vs 27.1). 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.
HazChem ships an update every 17 months, Decon Field Guide every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.
| Parameter | HazChem | Decon Field Guide |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.6 (8 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 17 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 27.1 | 15.1 — better |
| Further details — not scored | ||
| Size | 6 MB | 74 MB |
| Age rating | 4+ | 17+ |
| Developer | Darren Maxwell | First Line Technology |
In-app purchases
HazChem
No in-app purchases
Decon Field Guide
No in-app purchases
