DOT Chart 17 vs ChesHaz
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.
ChesHaz
Quickly identify hazardous materials using four-digit UN/NA numbers found on placards. Access chemical names and additional information offline. Links to external resources provide further details.
- Offline UN/NA number lookup
- Chemical name display
- Links to Wikipedia
- Links to NOAA information
- Educational purposes
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This is a quick, free app to look up the four-digit "UN/NA" numbers on the hazmat placards affixed to highway and rail tankers. The chemical names and other information is shown. The main data is stored off-line, so it is available when there is no network connectivity. There are links to Wikipedia pages and official online information from NOAA in the US. This app was written for educational purposes only. Though this data is carefully derived from official US government web pages and is believed to be presented accurately, first responders and other life savers should probably rely on hazmat apps from official sources.
Screenshots
Verdict
The clearest difference is review sentiment: ChesHaz at 100% against DOT Chart 17's 0%. ChesHaz also leads on rating (5.0 vs 2.3) and update cadence (every 6 weeks vs every 10 months). On price, ratings volume, ads and in-app purchases 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.
ChesHaz holds the better App Store score, 5.0 against 2.3. Both are backed by a comparable volume of ratings — 3 and 4 respectively. Written reviews point the same way: 0% of DOT Chart 17's written reviews are positive against 100% of ChesHaz's.
DOT Chart 17 ships an update every 10 months, ChesHaz every 6 weeks. The most recent releases landed on October 10, 2026 and October 7, 2026 respectively.
| Parameter | DOT Chart 17 | ChesHaz |
|---|---|---|
| Price | Free | Free |
| Rating | 2.3 (3 ratings) | 5.0 (4 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 3 | 4 — better |
| Update frequency | Every 10 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 | 10.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Pipeline and Hazardous Materials Safety Administration | WIlliam Cheswick |
Customer experience
DOT Chart 17
ChesHaz
In-app purchases
DOT Chart 17
No in-app purchases
ChesHaz
No in-app purchases
Questions
Is DOT Chart 17 free?
Is ChesHaz free?
Which has better reviews, DOT Chart 17 or ChesHaz?
Do DOT Chart 17 or ChesHaz have ads?
Which is updated more often, DOT Chart 17 or ChesHaz?
Other comparisons
