# NPMS Public Viewer vs Buxus

The clearest difference is review sentiment: NPMS Public Viewer at 40% against Buxus's 20%. NPMS Public Viewer also leads on rating (4.0 vs 3.7). Buxus's advantage is ratings volume (19 vs 4). 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.

NPMS Public Viewer holds the better App Store score, 4.0 against 3.7. Both are backed by a comparable volume of ratings — 4 and 19 respectively. Written reviews point the same way: 40% of NPMS Public Viewer's written reviews are positive against 20% of Buxus's.

NPMS Public Viewer ships an update every 2 months, Buxus every 6 weeks. The most recent releases landed on October 16, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | NPMS Public Viewer | Buxus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.0 (4 ratings)](https://appshunter.io/ios/app/npms-public-viewer/id1232277603/reviews)** | [3.7 (19 ratings)](https://appshunter.io/ios/app/buxus/id1561655680/reviews) |
| Number of ratings | 4 | **19** |
| Positive reviews | **40.0% of reviews** | 20.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 530 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [Sander Resources, L.L.C.](https://appshunter.io/developer/1537002754) |

## 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


### Buxus

[App page](https://appshunter.io/ios/app/buxus/id1561655680)

Access critical pipeline operator information, including emergency contacts, products transported, and hazard identification. This app helps emergency responders and the public understand and interact with local pipeline infrastructure.

**Highlights:** Emergency contact information, Products transported details, Hazard identification, Response guidance, Information request from operators, User reporting of critical information

**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 Buxus free?

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

### Which has better reviews, NPMS Public Viewer or Buxus?

NPMS Public Viewer is rated higher. NPMS Public Viewer averages 4.0 out of 5 from 4 ratings, while Buxus averages 3.7 from 19 ratings.

### Do NPMS Public Viewer or Buxus have ads?

Neither NPMS Public Viewer nor Buxus shows ads.

### Which is updated more often, NPMS Public Viewer or Buxus?

NPMS Public Viewer ships an update every 2 months, and Buxus every 6 weeks. Most recently, NPMS Public Viewer was updated on October 16, 2026 and Buxus on October 24, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*