# Southwire® Conversion Calc vs Kopperfield

The clearest difference is update cadence: Kopperfield at every 3 weeks against Southwire® Conversion Calc's every 4 months. Kopperfield also leads on device support (3 vs 1). Southwire® Conversion Calc's advantage is rating (4.2 vs 3.9) and monetization model (free vs ad-supported). On price, review sentiment, ratings volume and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Southwire® Conversion Calc holds the better App Store score, 4.2 against 3.9. Both are backed by a comparable volume of ratings — 5 and 9 respectively. Written reviews split almost evenly too, at 0% and 0% positive.

Southwire® Conversion Calc ships an update every 4 months, Kopperfield every 3 weeks. The most recent releases landed on September 15, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Southwire® Conversion Calc | Kopperfield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.2 (5 ratings)](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420/reviews)** | [3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews) |
| Number of ratings | 5 | **9** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 7 MB | 45 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Kopperfield](https://appshunter.io/developer/1756157251) |

## 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


### Kopperfield

[App page](https://appshunter.io/ios/app/kopperfield/id6736772332)

Streamline electrical design and permitting with powerful tools for load calculations, panel schedules, and single-line diagrams. Quickly reference the National Electrical Code with an AI-powered chatbot and generate instant PDF reports for inspectors and clients.

**Highlights:** Load calculator with NEC standards, Single line diagram tool, Panel schedule creation, NEC chatbot, Instant PDF report generation, AI panel photo processing, Team dashboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Southwire® Conversion Calc free?

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

### Is Kopperfield free?

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

### Which has better reviews, Southwire® Conversion Calc or Kopperfield?

Southwire® Conversion Calc is rated higher. Southwire® Conversion Calc averages 4.2 out of 5 from 5 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Southwire® Conversion Calc or Kopperfield have ads?

Neither Southwire® Conversion Calc nor Kopperfield shows ads.

### Which is updated more often, Southwire® Conversion Calc or Kopperfield?

Southwire® Conversion Calc ships an update every 4 months, and Kopperfield every 3 weeks. Most recently, Southwire® Conversion Calc was updated on September 15, 2026 and Kopperfield on September 16, 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.*