# ILICALC vs Cathodic Protection Calculator

The clearest difference is rating: Cathodic Protection Calculator at 5.0 against ILICALC's 4.5. Cathodic Protection Calculator also leads on update cadence (weekly vs every 2 weeks). ILICALC's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.0). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. Cathodic Protection Calculator sells 1 one-off in-app purchase. ILICALC asks for nothing beyond the download.

Cathodic Protection Calculator holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

ILICALC ships an update every 2 weeks, Cathodic Protection Calculator weekly. The most recent releases landed on October 24, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | ILICALC | Cathodic Protection Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (2 ratings)](https://appshunter.io/ios/app/ilicalc/id1498804397/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/cathodic-protection-calculator/id6498471281/reviews)** |
| Number of ratings | 2 | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 20 MB | 127 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Onstream Pipeline Inspection Services Inc](https://appshunter.io/developer/1498684216) | [Ell Engineering LLC](https://appshunter.io/developer/1741659303) |

## What reviewers say

### 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


### Cathodic Protection Calculator

[App page](https://appshunter.io/ios/app/cathodic-protection-calculator/id6498471281)

This app provides over 150 calculations for cathodic protection, covering testing, electrodes, resistivity, and current requirements. It supports both Metric and Imperial units, with a premium version offering advanced features.

**Highlights:** 150+ Cathodic Protection Calculations, Metric & Imperial Units, Cathodic Protection Testing, Reference Electrodes, Soil Resistivity, Structure Current Requirements, Anode Sizing & Lifespan

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Features | $9.99 | one-time |


## Frequently asked questions

### Is ILICALC free?

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

### Is Cathodic Protection Calculator free?

Cathodic Protection Calculator is free to download, with in-app purchases available.

### Which has better reviews, ILICALC or Cathodic Protection Calculator?

Cathodic Protection Calculator is rated higher. ILICALC averages 4.5 out of 5 from 2 ratings, while Cathodic Protection Calculator averages 5.0 from 5 ratings.

### Do ILICALC or Cathodic Protection Calculator have ads?

Neither ILICALC nor Cathodic Protection Calculator shows ads.

### Which is updated more often, ILICALC or Cathodic Protection Calculator?

ILICALC ships an update every 2 weeks, and Cathodic Protection Calculator weekly. Most recently, ILICALC was updated on October 24, 2026 and Cathodic Protection Calculator on September 30, 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.*