# HazChem vs TheHazMatApp

The clearest difference is ads: HazChem at none against TheHazMatApp's shown. TheHazMatApp's advantage is update cadence (every 6 weeks vs every 17 months) and iOS requirement (12.0 vs 27.1). On price, in-app purchases and device support 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, TheHazMatApp every 6 weeks. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | HazChem | TheHazMatApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/thehazmatapp/id1527123797/reviews)** |
| Number of ratings | — | **3** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 17 months | **Every 6 weeks** |
| Monetization | — | Ad-supported |
| Size | 6 MB | 22 MB |
| Requires iOS | 27.1 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Darren Maxwell](https://appshunter.io/developer/336341197) | [HazClass, INC.](https://appshunter.io/developer/1495948162) |

## What reviewers say

### HazChem

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

**In-app purchases:** none


### 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 HazChem free?

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

### Is TheHazMatApp free?

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

### Do HazChem or TheHazMatApp have ads?

TheHazMatApp shows ads; HazChem does not.

### Which is updated more often, HazChem or TheHazMatApp?

HazChem ships an update every 17 months, and TheHazMatApp every 6 weeks. Most recently, HazChem was updated on October 24, 2026 and TheHazMatApp on October 18, 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.*