# NPMS Public Viewer vs ILICALC

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.

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.

## The numbers

| Metric | NPMS Public Viewer | ILICALC |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (4 ratings)](https://appshunter.io/ios/app/npms-public-viewer/id1232277603/reviews) | **[4.5 (2 ratings)](https://appshunter.io/ios/app/ilicalc/id1498804397/reviews)** |
| Number of ratings | **4** | 2 |
| Positive reviews | 40.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Free | Free |
| Size | 2 MB | 20 MB |
| Requires iOS | 14.0 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Pipeline and Hazardous Materials Safety Administration](https://appshunter.io/developer/954888820) | [Onstream Pipeline Inspection Services Inc](https://appshunter.io/developer/1498684216) |

## 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


### ILICALC

[App page](https://appshunter.io/ios/app/ilicalc/id1498804397)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**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 ILICALC free?

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

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

ILICALC is rated higher. NPMS Public Viewer averages 4.0 out of 5 from 4 ratings, while ILICALC averages 4.5 from 2 ratings.

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

Neither NPMS Public Viewer nor ILICALC shows ads.

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

NPMS Public Viewer ships an update every 2 months, and ILICALC every 2 weeks. Most recently, NPMS Public Viewer was updated on September 22, 2026 and ILICALC on June 4, 2026.

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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.*