# EPA RSL/RML vs ERG for iOS

The clearest difference is review sentiment: ERG for iOS at 100% against EPA RSL/RML's 50%. ERG for iOS also leads on rating (4.8 vs 4.0) and ratings volume (65 vs 3). On price, update cadence, 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.

ERG for iOS holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: ERG for iOS has 65 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 50% of EPA RSL/RML's written reviews are positive against 100% of ERG for iOS's.

EPA RSL/RML ships an update every 5 months, ERG for iOS every 4 months. The most recent releases landed on October 13, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | EPA RSL/RML | ERG for iOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (3 ratings)](https://appshunter.io/ios/app/epa-rslrml/id1461247823/reviews) | **[4.8 (65 ratings)](https://appshunter.io/ios/app/erg-for-ios/id1597142669/reviews)** |
| Number of ratings | 3 | **65** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free | Free |
| Best chart rank | — | **#135** |
| Size | 23 MB | 27 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [United States Environmental Protection Agency (USEPA)](https://appshunter.io/developer/466052690) | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) |

## What reviewers say

### EPA RSL/RML

[App page](https://appshunter.io/ios/app/epa-rslrml/id1461247823)

This app provides chemical-specific concentrations for contaminants in air, water, and soil. These levels help determine if further investigation or cleanup is needed. It is updated twice a year.

**Highlights:** Regional Screening Levels (RSLs), Removal Management Levels (RMLs), Chemical-specific concentrations, Risk-based levels, Updated twice a year

**Features:** macOS Compatibility

**In-app purchases:** none


### ERG for iOS

[App page](https://appshunter.io/ios/app/erg-for-ios/id1597142669)

**Currently charting:** #135 Top Free · Reference (US App Store)

This app provides first responders with quick access to critical information for hazardous materials transportation incidents. It features an indexed list of dangerous goods, including ID numbers, hazards, and safety precautions, aiding in effective response.

**Highlights:** Indexed list of dangerous goods, ID number lookup, General hazard information, Recommended safety precautions, Multi-language support (English, French, Spanish)

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

**In-app purchases:** none


## Frequently asked questions

### Is EPA RSL/RML free?

EPA RSL/RML is free to download, with no in-app purchases.

### Is ERG for iOS free?

ERG for iOS is free to download, with no in-app purchases.

### Which has better reviews, EPA RSL/RML or ERG for iOS?

ERG for iOS is rated higher. EPA RSL/RML averages 4.0 out of 5 from 3 ratings, while ERG for iOS averages 4.8 from 65 ratings.

### Do EPA RSL/RML or ERG for iOS have ads?

Neither EPA RSL/RML nor ERG for iOS shows ads.

### Which is updated more often, EPA RSL/RML or ERG for iOS?

EPA RSL/RML ships an update every 5 months, and ERG for iOS every 4 months. Most recently, EPA RSL/RML was updated on October 13, 2026 and ERG for iOS on October 27, 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.*