# oCFR vs TheHazMatApp

The clearest difference is ads: oCFR at none against TheHazMatApp's shown. oCFR also leads on monetization model (free vs ad-supported) and ratings volume (9 vs 3). TheHazMatApp's advantage is update cadence (every 6 weeks vs every 6 months). On price, rating, 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.

On the App Store both sit at effectively the same score — 3.7 for oCFR against 3.7 for TheHazMatApp. Both are backed by a comparable volume of ratings — 9 and 3 respectively.

oCFR ships an update every 6 months, TheHazMatApp every 6 weeks. The most recent releases landed on October 24, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | oCFR | TheHazMatApp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/ocfr/id1228220888/reviews) | [3.7 (3 ratings)](https://appshunter.io/ios/app/thehazmatapp/id1527123797/reviews) |
| Number of ratings | **9** | 3 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 months | **Every 6 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 70 MB | 22 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [HazClass, INC.](https://appshunter.io/developer/1495948162) |

## What reviewers say

### oCFR

[App page](https://appshunter.io/ios/app/ocfr/id1228220888)

Access U.S. federal regulations for the safe transportation of hazardous materials and pipeline safety. Covers regulations for classifying, handling, and packaging materials by various transport modes, as well as pipeline facility safety standards.

**Highlights:** Hazardous Materials Regulations (HMR), Pipeline Safety Regulations, 49 CFR Parts 100-180, 49 CFR Parts 190-199, Covers highway, rail, aircraft, and vessel transport, Includes design, construction, operation, and maintenance standards

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

**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 oCFR free?

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

### Is TheHazMatApp free?

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

### Which has better reviews, oCFR or TheHazMatApp?

oCFR and TheHazMatApp are both rated 3.7 out of 5 on the App Store, from 9 and 3 ratings respectively.

### Do oCFR or TheHazMatApp have ads?

TheHazMatApp shows ads; oCFR does not.

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

oCFR ships an update every 6 months, and TheHazMatApp every 6 weeks. Most recently, oCFR 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.*