# oCFR vs Decon Field Guide

The clearest difference is review sentiment: oCFR at 50% against Decon Field Guide's 0%. oCFR also leads on monetization model (free vs ad-supported) and iOS requirement (11.0 vs 15.1). Decon Field Guide's advantage is rating (4.6 vs 3.7) and update cadence (every 2 months vs every 6 months). On price, ratings volume, 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.

Decon Field Guide holds the better App Store score, 4.6 against 3.7. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews complicate that: 50% of oCFR's written reviews are positive against 0% of Decon Field Guide's, so the app with the better star average is not the one people write more warmly about.

oCFR ships an update every 6 months, Decon Field Guide every 2 months. Both last shipped on November 2, 2026.

## The numbers

| Metric | oCFR | Decon Field Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.7 (9 ratings)](https://appshunter.io/ios/app/ocfr/id1228220888/reviews) | **[4.6 (8 ratings)](https://appshunter.io/ios/app/decon-field-guide/id1388378944/reviews)** |
| Number of ratings | **9** | 8 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 70 MB | 74 MB |
| Requires iOS | **11.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [First Line Technology](https://appshunter.io/developer/1388378943) |

## 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


### Decon Field Guide

[App page](https://appshunter.io/ios/app/decon-field-guide/id1388378944)

This reference app provides quick and efficient decontamination methods for hundreds of threats. It features a classic Threat Index, pictorial instructions, and an in-app dwell timer to guide users through mission execution. Designed for approved users, it aims to make anyone an instant decontamination expert.

**Highlights:** Threat Index for decontamination methods, Pictorial instructions, In-app dwell timer, Covers hundreds of threats, Designed for approved users

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is oCFR free?

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

### Is Decon Field Guide free?

Decon Field Guide is free to download, with no in-app purchases.

### Which has better reviews, oCFR or Decon Field Guide?

Decon Field Guide is rated higher. oCFR averages 3.7 out of 5 from 9 ratings, while Decon Field Guide averages 4.6 from 8 ratings.

### Do oCFR or Decon Field Guide have ads?

Neither oCFR nor Decon Field Guide shows ads.

### Which is updated more often, oCFR or Decon Field Guide?

oCFR ships an update every 6 months, and Decon Field Guide every 2 months. Most recently, oCFR was updated on November 2, 2026 and Decon Field Guide on November 2, 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.*