NPMS Public Viewer vs Buxus
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NPMS Public Viewer
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.
- Hazardous pipeline maps
- Operator identification
- Material transported details
- Contact information
- Location-based search
- County and offshore area selection
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The Pipeline and Hazardous Materials Safety Administration’s (PHMSA) National Pipeline Mapping System (NPMS) has developed the NPMS Public Viewer iPhone app to allow the public to view hazardous liquid and gas transmission pipeline maps. The user can see who operates a pipeline, what it transports, and who to contact for further information. To get started, a user may choose one county or offshore area (including state waters or federal waters) or choose to see pipelines closest to the user’s current location. For more information about the NPMS, or to access the full desktop browser version of the NPMS Public Map Viewer, go to the NPMS website at https://www.npms.phmsa.dot.gov/.
Buxus
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.
- Emergency contact information
- Products transported details
- Hazard identification
- Response guidance
- Information request from operators
- User reporting of critical information
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Buxus® is the essential tool that bridges the gap between pipeline operators and other facility operators and those who need critical information most: emergency responders, the public, and other important stakeholders. Access on-demand details about pipelines and critical infrastructure in your area, including emergency contacts, safety information, transported materials, and hazard identification. Key Features: - Instant access to operator-specific safety information. - Emergency preparedness and response training resources. - Direct communication channel to request and report vital information. - Tailored content for emergency responders, the public, excavators, public officials, and the community. Buxus® ensures everyone has the information they need, when they need it, to protect lives and infrastructure. Download Buxus® and be aware and prepared.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | NPMS Public Viewer | Buxus |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) — better | 3.7 (19 ratings) |
| Positive reviews | 40.0% of reviews — better | 20.0% of reviews |
| Number of ratings | 4 | 19 — better |
| Update frequency | Every 2 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 14.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 2 MB | 530 MB |
| Age rating | 4+ | 12+ |
| Developer | Pipeline and Hazardous Materials Safety Administration | Sander Resources, L.L.C. |
Customer experience
NPMS Public Viewer
Buxus
In-app purchases
NPMS Public Viewer
No in-app purchases
Buxus
No in-app purchases






