# HazChem vs DOT Chart 17

The clearest difference is iOS requirement: DOT Chart 17 at 11.0 against HazChem's 27.1. On price, update cadence, 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.

HazChem ships an update every 17 months, DOT Chart 17 every 10 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | HazChem | DOT Chart 17 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[2.3 (3 ratings)](https://appshunter.io/ios/app/dot-chart-17/id1245251292/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 17 months | **Every 10 months** |
| Monetization | — | Free |
| Size | 6 MB | 20 MB |
| Requires iOS | 27.1 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Darren Maxwell](https://appshunter.io/developer/336341197) | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) |

## What reviewers say

### HazChem

[App page](https://appshunter.io/ios/app/hazchem/id645637554)

**In-app purchases:** none


### 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


## Frequently asked questions

### Is HazChem free?

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

### Is DOT Chart 17 free?

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

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

Neither HazChem nor DOT Chart 17 shows ads.

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

HazChem ships an update every 17 months, and DOT Chart 17 every 10 months. Most recently, HazChem was updated on October 24, 2026 and DOT Chart 17 on October 24, 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.*