Comparison

AskRail vs NPMS Public Viewer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

AskRail

This app provides hazardous materials safety information for first responders dealing with rail incidents. It allows authorized personnel to query railcar contents and offers critical data for emergency response. Access to advanced features requires verification and railroad sponsorship.

Highlights
  • Hazardous materials safety information
  • Rail incident support
  • Query railcar contents
  • Emergency response data
  • First responder tool
Features
Read full description

The AskRail app is a hazardous materials safety tool for first responders who are first on scene or directly support the first on scene in the event of a rail incident. Access to certain features, including the ability to query railcar contents based on an equipment number, is restricted to authorized personnel. To obtain authorization to use the restricted features, you must assert that you are a first responder, provide information about your emergency response agency, and identify a supervisor who can attest to your first responder duties. You also must obtain sponsorship from a Class I railroad. This process may take up to several weeks. AskRail is a collaborative effort among all North American Class I railroads, the Association of American Railroads, Railinc Corp., and the Transportation Technology Center, Inc. For more information about AskRail please visit: www.askrail.us.

About

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.

Highlights
  • Hazardous pipeline maps
  • Operator identification
  • Material transported details
  • Contact information
  • Location-based search
  • County and offshore area selection
Read full description

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/.

Screenshots

AskRail4 screens
NPMS Public Viewer4 screens

Verdict

The call

AskRail and NPMS Public Viewer both sit at 4.1 stars, but that hides the real split: 58% of AskRail's written reviews are positive against 40% of NPMS Public Viewer's. AskRail also leads on ratings volume (37 vs 4). NPMS Public Viewer's advantage is iOS requirement (14.0 vs 16.0). On price, rating, update cadence and ads 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

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.1 for AskRail against 4.0 for NPMS Public Viewer. That said, the two scores are not equally well evidenced: AskRail has 37 ratings behind it against 4, so its average is the more settled of the two. Written reviews are what separate them: 58% of AskRail's written reviews are positive against 40% of NPMS Public Viewer's.

UpkeepUpdate frequency

AskRail ships an update every 4 months, NPMS Public Viewer every 2 months. The most recent releases landed on October 29, 2026 and October 16, 2026 respectively.

Scorecard3 real differences · 7 level
AskRail versus NPMS Public Viewer: the parameters behind the verdict, then further details
ParameterAskRailNPMS Public Viewer
PriceFreeFree
Rating4.1 (37 ratings) — better4.0 (4 ratings)
Positive reviews58.3% of reviews — better40.0% of reviews
Number of ratings37 — better4
Update frequencyEvery 4 monthsEvery 2 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.014.0 — better
Further details — not scored
Size44 MB2 MB
Age rating12+4+
DeveloperAssociation of American RailroadsPipeline and Hazardous Materials Safety Administration

Customer experience

AskRail

All ratings37 ratings
Positive78.4%
Neutral0.0%
Negative21.6%
Written reviews12 reviews
Positive58.3%
Neutral0.0%
Negative41.7%

NPMS Public Viewer

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews5 reviews
Positive40.0%
Neutral0.0%
Negative60.0%

In-app purchases

None

AskRail

No in-app purchases

None

NPMS Public Viewer

No in-app purchases

Questions

Is AskRail free?
AskRail is free to download, with no in-app purchases.
Is NPMS Public Viewer free?
NPMS Public Viewer is free to download, with no in-app purchases.
Which has better reviews, AskRail or NPMS Public Viewer?
AskRail is rated higher. AskRail averages 4.1 out of 5 from 37 ratings, while NPMS Public Viewer averages 4.0 from 4 ratings.
Do AskRail or NPMS Public Viewer have ads?
Neither AskRail nor NPMS Public Viewer shows ads.
Which is updated more often, AskRail or NPMS Public Viewer?
AskRail ships an update every 4 months, and NPMS Public Viewer every 2 months. Most recently, AskRail was updated on October 29, 2026 and NPMS Public Viewer on October 16, 2026.

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