HazChem vs DOT Chart 17
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.
DOT Chart 17
Access a full-color display of hazardous materials markings, labels, and placards. This app provides quick visual information and regulatory citations for shippers and carriers. It serves as a general guidance tool for hazardous materials regulations.
- Full-color display of markings, labels, and placards
- Access to Hazardous Materials Regulations (HMR) citations
- Quick visual information for shippers and carriers
- Mobile access to DOT Chart-17
- Guidance on 49 CFR Parts 171-180
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The Pipeline and Hazardous Materials Safety Administration’s (PHMSA) DOT Chart-17 provides a full-color display of the markings, labels, and placards specified in the Hazardous Materials Regulations (HMR; 49 CFR Parts 171-180). This mobile application allows shippers, carriers, and other stakeholders to quickly access visual information and HMR citations from DOT Chart-17. Note that this application is intended for general guidance only and should not be used to determine compliance with 49 CFR, Parts 100-185.
Screenshots
Verdict
The clearest difference is update cadence: DOT Chart 17 at every 10 months against HazChem's every 22 months. DOT Chart 17 also leads on iOS requirement (11.0 vs 16.6). 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 22 months, DOT Chart 17 every 10 months. The most recent releases landed on September 9, 2026 and September 10, 2026 respectively.
| Parameter | HazChem | DOT Chart 17 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 2.3 (3 ratings) — better |
| Positive reviews | — | 0.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 22 months | Every 10 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 16.6 | 11.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Darren Maxwell | Pipeline and Hazardous Materials Safety Administration |
In-app purchases
HazChem
No in-app purchases
DOT Chart 17
No in-app purchases
