# Fault Current Calculator vs Lug Link

The clearest difference is review sentiment: Lug Link at 100% against Fault Current Calculator's 0%. Lug Link also leads on rating (5.0 vs 3.1) and in-app purchases (none vs 2). Fault Current Calculator's advantage is ratings volume (23 vs 5). On price, ads and device support there is nothing between them.

Both are free to download. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month. Lug Link asks for nothing beyond the download.

Lug Link holds the better App Store score, 5.0 against 3.1. Both are backed by a comparable volume of ratings — 23 and 5 respectively. Written reviews point the same way: 0% of Fault Current Calculator's written reviews are positive against 100% of Lug Link's.

Fault Current Calculator ships an update every 4 months, Lug Link weekly. The most recent releases landed on October 2, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | Lug Link |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (23 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/lug-link/id1145583645/reviews)** |
| Number of ratings | **23** | 5 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Weekly** |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 15 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [ABB Installation Products Inc.](https://appshunter.io/developer/402280965) |

## What reviewers say

### Fault Current Calculator

[App page](https://appshunter.io/ios/app/fault-current-calculator/id647477910)

This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.

**Highlights:** Calculate available fault current, Size fuses and conductors, Generate service equipment labels, Single and three-phase system support, NEC® 110.24 compliance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Subscription | $39.99 | per year |


### Lug Link

[App page](https://appshunter.io/ios/app/lug-link/id1145583645)

This utility app helps users select the correct Color-Keyed lug for specific electrical applications. It offers choices for aluminum or copper lugs, hole configurations, and barrel lengths, eliminating the need for cross-referencing part numbers.

**Highlights:** Color-Keyed lug selection, Aluminum or copper lug options, One or two hole configurations, Standard or long barrel options, Splice selections available, Eliminates part number cross-referencing

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Fault Current Calculator free?

Fault Current Calculator is free to download, with in-app purchases available.

### Is Lug Link free?

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

### Which has better reviews, Fault Current Calculator or Lug Link?

Lug Link is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while Lug Link averages 5.0 from 5 ratings.

### Do Fault Current Calculator or Lug Link have ads?

Neither Fault Current Calculator nor Lug Link shows ads.

### Which is updated more often, Fault Current Calculator or Lug Link?

Fault Current Calculator ships an update every 4 months, and Lug Link weekly. Most recently, Fault Current Calculator was updated on October 2, 2026 and Lug Link on October 3, 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.*