NPMS Public Viewer vs ILICALC
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/.
ILICALC
This app calculates pipeline flow rates and pressures in various units. It also helps determine ILI or pig run times and convert units for flow rates, pressures, and distances. Users can look up pipe schedules, wall thickness, and pipe grades.
- Calculate pipeline flow rates and pressures
- Determine ILI or pig run times
- Convert units for flow, pressure, and distance
- Lookup pipe schedules and specifications
- Supports multiple units of measurement
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CALCULATE - Pipeline flow rates and pressures in a variety of units - bbls/hr, e3m3/day, etc - ILI or pig run times under various conditions CONVERT UNITS - Flow rates - Pressures - Distance LOOKUP - Pipe schedules - Wall thickness - Pipe grades
Screenshots
Verdict
The clearest difference is review sentiment: ILICALC at 100% against NPMS Public Viewer's 40%. ILICALC also leads on rating (4.5 vs 4.0) and update cadence (every 2 weeks vs every 2 months). On price, ratings volume, 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.
ILICALC holds the better App Store score, 4.5 against 4.0. Both are backed by a comparable volume of ratings — 4 and 2 respectively. Written reviews point the same way: 40% of NPMS Public Viewer's written reviews are positive against 100% of ILICALC's.
NPMS Public Viewer ships an update every 2 months, ILICALC every 2 weeks. The most recent releases landed on September 22, 2026 and June 4, 2026 respectively.
| Parameter | NPMS Public Viewer | ILICALC |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (4 ratings) | 4.5 (2 ratings) — better |
| Positive reviews | 40.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 4 — better | 2 |
| Update frequency | Every 2 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPod | iPhone, iPod |
| Requires iOS | 14.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Pipeline and Hazardous Materials Safety Administration | Onstream Pipeline Inspection Services Inc |
Customer experience
NPMS Public Viewer
ILICALC
In-app purchases
NPMS Public Viewer
No in-app purchases
ILICALC
No in-app purchases
Questions
Is NPMS Public Viewer free?
Is ILICALC free?
Which has better reviews, NPMS Public Viewer or ILICALC?
Do NPMS Public Viewer or ILICALC have ads?
Which is updated more often, NPMS Public Viewer or ILICALC?
Other comparisons
