HazChem vs TheHazMatApp
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.
TheHazMatApp
Access a comprehensive database of hazardous materials and their assigned building and fire code hazard classifications. Quickly look up chemicals by name or CAS number to determine their specific hazard status.
- Hazardous materials database
- Building and fire code classifications
- Lookup by Chemical Name
- Lookup by CAS Number
- Expert-assigned classifications
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TheHazMatApp provides engineers, consultants, building owners, and inspectors a database of hazardous materials that have been assigned building and fire code hazard classifications by experts and industry professionals. Lookup various chemicals by Chemical Name or CAS Number to determine their hazard classification.
Screenshots
Verdict
The clearest difference is ads: HazChem at none against TheHazMatApp's shown. TheHazMatApp's advantage is update cadence (every 6 weeks vs every 22 months) and iOS requirement (12.0 vs 16.6). On price, 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 22 months, TheHazMatApp every 6 weeks. The most recent releases landed on September 9, 2026 and June 28, 2026 respectively.
| Parameter | HazChem | TheHazMatApp |
|---|---|---|
| Price | Free | Free |
| Rating | — | 3.7 (3 ratings) — better |
| Number of ratings | — | 3 — better |
| Update frequency | Every 22 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | — | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 16.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Darren Maxwell | HazClass, INC. |
In-app purchases
HazChem
No in-app purchases
TheHazMatApp
No in-app purchases
