# HazMat Reference vs Hazmat Registration Search

The clearest difference is price: Hazmat Registration Search at Free against HazMat Reference's $4.99. Hazmat Registration Search also leads on iOS requirement (11.0 vs 14.0). HazMat Reference's advantage is ratings volume (1.8K vs 2) and chart position (#23 vs unranked). On rating, update cadence, ads and in-app purchases there is nothing between them.

Hazmat Registration Search is free to download; HazMat Reference costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Hazmat Registration Search holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: HazMat Reference has 1.8K ratings behind it against 2, so its average is the more settled of the two.

HazMat Reference ships an update every 4 months, Hazmat Registration Search every 5 months. The most recent releases landed on November 10, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | HazMat Reference | Hazmat Registration Search |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.8 (1.8K ratings)](https://appshunter.io/ios/app/hazmat-reference/id385775821/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/hazmat-registration-search/id1459678141/reviews)** |
| Number of ratings | **1.8K** | 2 |
| Positive reviews | 95.9% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Paid | **Free** |
| Best chart rank | **#23** | — |
| Size | 75 MB | 17 MB |
| Requires iOS | 14.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [ThatsMyStapler Inc.](https://appshunter.io/developer/337472637) | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) |

## What reviewers say

### HazMat Reference

[App page](https://appshunter.io/ios/app/hazmat-reference/id385775821)

**Currently charting:** #23 Top Paid · Reference (US App Store)

Quickly access critical information on hazardous materials for handling, storage, and incident response. Features include advanced search, sorting, and filtering of materials from key regulatory tables and guides. Offline access ensures availability in any situation.

**Highlights:** ERG 2024 data, NIOSH, CFR/HMT, NFPA, GHS information, Advanced search, sort, and filter, Offline access, NFPA Fire Diamond, Physical descriptions and CAS#, DOT incident data filter

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

**In-app purchases:** none

**What reviewers like**

- 💡 Excellent tool
- 🚀 Saves time
- 👍 Handy app
- 👍 User-friendly
- 👍 Great resource

**What reviewers complain about**

- 🐛 Closed unexpectedly
- 🐛 Outdated information
- 👎 Color of distance pages makes it unreadable
- 👎 User interface not great

**Reported bugs**

- Bulk packaging information part of CFR 49 won't load

**Requested features**

- Format for larger phones
- Ability to print guide or reference material


### Hazmat Registration Search

[App page](https://appshunter.io/ios/app/hazmat-registration-search/id1459678141)

Easily check the status of hazmat registrations for companies. Search by registration ID, USDOT number, postal code, or company name. Generate and share PDF certificates of registration.

**Highlights:** Search hazmat registration database, Basic and advanced search options, Search by registration ID, USDOT #, postal code, company name, View company registration details, Generate PDF registration certificates, Save or email certificates

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

**In-app purchases:** none


## Frequently asked questions

### Is HazMat Reference free?

HazMat Reference costs $4.99, with no in-app purchases.

### Is Hazmat Registration Search free?

Hazmat Registration Search is free to download, with no in-app purchases.

### Which has better reviews, HazMat Reference or Hazmat Registration Search?

Hazmat Registration Search is rated higher. HazMat Reference averages 4.8 out of 5 from 1.8K ratings, while Hazmat Registration Search averages 5.0 from 2 ratings.

### Do HazMat Reference or Hazmat Registration Search have ads?

Neither HazMat Reference nor Hazmat Registration Search shows ads.

### Which is updated more often, HazMat Reference or Hazmat Registration Search?

HazMat Reference ships an update every 4 months, and Hazmat Registration Search every 5 months. Most recently, HazMat Reference was updated on November 10, 2026 and Hazmat Registration Search on November 3, 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.*