# NPMS Public Viewer vs Rail Guide

The clearest difference is review sentiment: Rail Guide at 100% against NPMS Public Viewer's 40%. Rail Guide also leads on rating (5.0 vs 4.0) and ratings volume (21 vs 4). NPMS Public Viewer's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Rail Guide holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Rail Guide has 21 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 40% of NPMS Public Viewer's written reviews are positive against 100% of Rail Guide's.

## The numbers

| Metric | NPMS Public Viewer | Rail Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/npms-public-viewer/id1232277603/reviews) | **[5.0 (21 ratings)](https://appshunter.io/ios/app/rail-guide/id6749467546/reviews)** |
| Number of ratings | 4 | **21** |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | — |
| Monetization | **Free** | Ad-supported |
| Size | 2 MB | 17 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [Rail Guide LLC](https://appshunter.io/developer/1479376427) |

## What reviewers say

### NPMS Public Viewer

[App page](https://appshunter.io/ios/app/npms-public-viewer/id1232277603)

View maps of hazardous liquid and gas transmission pipelines. Discover pipeline operators, the materials they transport, and contact information. Locate pipelines by county, offshore area, or proximity to your current location.

**Highlights:** Hazardous pipeline maps, Operator identification, Material transported details, Contact information, Location-based search, County and offshore area selection

**In-app purchases:** none


### Rail Guide

[App page](https://appshunter.io/ios/app/rail-guide/id6749467546)

Explore detailed maps of active, historic, and abandoned rail lines across the US, Canada, and Mexico. Includes milepost data for most routes and points of interest. Stay updated on map changes via the official Facebook page.

**Highlights:** North American rail line maps, Current, historic, and abandoned lines, Milepost data, Points of interest, Map update notifications

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

**In-app purchases:** none


## Frequently asked questions

### Is NPMS Public Viewer free?

NPMS Public Viewer is free to download, with no in-app purchases.

### Is Rail Guide free?

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

### Which has better reviews, NPMS Public Viewer or Rail Guide?

Rail Guide is rated higher. NPMS Public Viewer averages 4.0 out of 5 from 4 ratings, while Rail Guide averages 5.0 from 21 ratings.

### Do NPMS Public Viewer or Rail Guide have ads?

Rail Guide shows ads; NPMS Public Viewer does not.

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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.*