DOT Chart 17 vs TheHazMatApp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
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 rating: TheHazMatApp at 3.7 against DOT Chart 17's 2.3. TheHazMatApp also leads on update cadence (every 6 weeks vs every 10 months). DOT Chart 17's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, 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.
TheHazMatApp holds the better App Store score, 3.7 against 2.3. Both are backed by a comparable volume of ratings — 3 and 3 respectively.
DOT Chart 17 ships an update every 10 months, TheHazMatApp every 6 weeks. The most recent releases landed on September 10, 2026 and June 28, 2026 respectively.
| Parameter | DOT Chart 17 | TheHazMatApp |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 3.7 (3 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 3 | 3 |
| Update frequency | Every 10 months | Every 6 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 12.0 |
| Further details — not scored | ||
| Size | 20 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Pipeline and Hazardous Materials Safety Administration | HazClass, INC. |
Customer experience
DOT Chart 17
TheHazMatApp
In-app purchases
DOT Chart 17
No in-app purchases
TheHazMatApp
No in-app purchases
