# UN Number vs TheHazMatApp

The clearest difference is rating: UN Number at 4.7 against TheHazMatApp's 3.7. UN Number also leads on ads (none vs shown) and ratings volume (54 vs 3). TheHazMatApp's advantage is in-app purchases (none vs 5) and update cadence (every 6 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. UN Number sells 5 in-app purchases, starting at $1.99 per month. TheHazMatApp asks for nothing beyond the download.

UN Number holds the better App Store score, 4.7 against 3.7. That said, the two scores are not equally well evidenced: UN Number has 54 ratings behind it against 3, so its average is the more settled of the two.

UN Number ships an update every 3 months, TheHazMatApp every 6 weeks. The most recent releases landed on September 22, 2026 and June 28, 2026 respectively.

## The numbers

| Metric | UN Number | TheHazMatApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (54 ratings)](https://appshunter.io/ios/app/un-number/id307373793/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/thehazmatapp/id1527123797/reviews) |
| Number of ratings | **54** | 3 |
| Positive reviews | 63.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Size | 44 MB | 22 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ZWEIDENKER Holding GmbH](https://appshunter.io/developer/307356444) | [HazClass, INC.](https://appshunter.io/developer/1495948162) |

## What reviewers say

### UN Number

[App page](https://appshunter.io/ios/app/un-number/id307373793)

Quickly access essential information for hazardous materials emergencies. This reference guide provides detailed data based on established emergency response cards, usable even without an internet connection. It's designed for rapid retrieval of critical details in critical situations.

**Highlights:** Enter UN numbers via keypad, Quick information retrieval, Based on ERI-Cards, Offline functionality, Categorized data display, User-friendly interface

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| UN⁺ Monthly | $1.99 | per month |
| UN⁺ Yearly | $17.99 | per year |
| ADR Label | $0.99 | one-time |
| Hazard Diamond | $0.99 | one-time |
| Hommel | $2.99 | one-time |


### TheHazMatApp

[App page](https://appshunter.io/ios/app/thehazmatapp/id1527123797)

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.

**Highlights:** Hazardous materials database, Building and fire code classifications, Lookup by Chemical Name, Lookup by CAS Number, Expert-assigned classifications

**In-app purchases:** none


## Frequently asked questions

### Is UN Number free?

UN Number is free to download, with in-app purchases available.

### Is TheHazMatApp free?

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

### Which has better reviews, UN Number or TheHazMatApp?

UN Number is rated higher. UN Number averages 4.7 out of 5 from 54 ratings, while TheHazMatApp averages 3.7 from 3 ratings.

### Do UN Number or TheHazMatApp have ads?

TheHazMatApp shows ads; UN Number does not.

### Which is updated more often, UN Number or TheHazMatApp?

UN Number ships an update every 3 months, and TheHazMatApp every 6 weeks. Most recently, UN Number was updated on September 22, 2026 and TheHazMatApp on June 28, 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.*