# Southwire® Conversion Calc vs Fault Current Calculator

The clearest difference is rating: Southwire® Conversion Calc at 4.2 against Fault Current Calculator's 3.0. Southwire® Conversion Calc also leads on in-app purchases (none vs 2). Fault Current Calculator's advantage is ratings volume (27 vs 5) and device support (3 vs 1). On price, review sentiment, update cadence and ads there is nothing between them.

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

Southwire® Conversion Calc holds the better App Store score, 4.2 against 3.0. That said, the two scores are not equally well evidenced: Fault Current Calculator has 27 ratings behind it against 5, so its average is the more settled of the two. Written reviews split almost evenly too, at 0% and 0% positive.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on October 2, 2026 and October 23, 2026 respectively.

## The numbers

| Metric | Southwire® Conversion Calc | Fault Current Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420/reviews)** | [3.0 (27 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) |
| Number of ratings | 5 | **27** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Freemium |
| Size | 7 MB | 25 MB |
| Requires iOS | 16.6 | **14.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) |

## What reviewers say

### Southwire® Conversion Calc

[App page](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420)

This utility app facilitates conversions between copper and aluminum electrical wiring. It allows users to calculate pricing, unit of measure, conversion factors, and weight based on product length. The app comes preloaded with numerous cable types for easy calculation.

**Highlights:** Copper to aluminum conversion, Aluminum to copper conversion, Pricing unit of measure calculation, Conversion factor calculation, Weight per product length calculation, Preloaded cable data

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Southwire® Conversion Calc free?

Southwire® Conversion Calc is free to download, with no in-app purchases.

### Is Fault Current Calculator free?

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

### Which has better reviews, Southwire® Conversion Calc or Fault Current Calculator?

Southwire® Conversion Calc is rated higher. Southwire® Conversion Calc averages 4.2 out of 5 from 5 ratings, while Fault Current Calculator averages 3.0 from 27 ratings.

### Do Southwire® Conversion Calc or Fault Current Calculator have ads?

Neither Southwire® Conversion Calc nor Fault Current Calculator shows ads.

### Which is updated more often, Southwire® Conversion Calc or Fault Current Calculator?

Southwire® Conversion Calc ships an update every 4 months, and Fault Current Calculator every 4 months. Most recently, Southwire® Conversion Calc was updated on October 2, 2026 and Fault Current Calculator on October 23, 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.*