# DOT Chart 17 vs ChesHaz

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.

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.

## The numbers

| Metric | DOT Chart 17 | ChesHaz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.3 (3 ratings)](https://appshunter.io/ios/app/dot-chart-17/id1245251292/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/cheshaz/id1320963064/reviews)** |
| Number of ratings | 3 | **4** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 10 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 20 MB | 3 MB |
| Requires iOS | 11.0 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [WIlliam Cheswick](https://appshunter.io/developer/419708950) |

## What reviewers say

### DOT Chart 17

[App page](https://appshunter.io/ios/app/dot-chart-17/id1245251292)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### ChesHaz

[App page](https://appshunter.io/ios/app/cheshaz/id1320963064)

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.

**Highlights:** Offline UN/NA number lookup, Chemical name display, Links to Wikipedia, Links to NOAA information, Educational purposes

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DOT Chart 17 free?

DOT Chart 17 is free to download, with no in-app purchases.

### Is ChesHaz free?

ChesHaz is free to download, with no in-app purchases.

### Which has better reviews, DOT Chart 17 or ChesHaz?

ChesHaz is rated higher. DOT Chart 17 averages 2.3 out of 5 from 3 ratings, while ChesHaz averages 5.0 from 4 ratings.

### Do DOT Chart 17 or ChesHaz have ads?

Neither DOT Chart 17 nor ChesHaz shows ads.

### Which is updated more often, DOT Chart 17 or ChesHaz?

DOT Chart 17 ships an update every 10 months, and ChesHaz every 6 weeks. Most recently, DOT Chart 17 was updated on October 10, 2026 and ChesHaz on October 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*