# Southwire® Conversion Calc vs NEMA Guide

The clearest difference is rating: NEMA Guide at 5.0 against Southwire® Conversion Calc's 4.2. NEMA Guide also leads on update cadence (every 2 days vs every 4 months). Southwire® Conversion Calc's advantage is ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

NEMA Guide holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: Southwire® Conversion Calc has 5 ratings behind it against 1, so its average is the more settled of the two.

Southwire® Conversion Calc ships an update every 4 months, NEMA Guide every 2 days. The most recent releases landed on November 6, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | Southwire® Conversion Calc | NEMA Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/nema-guide/id6746103301/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 days** |
| Monetization | Free | Free |
| Size | 7 MB | 23 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Red Zepp LLC](https://appshunter.io/developer/1812216821) |

## 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


### NEMA Guide

[App page](https://appshunter.io/ios/app/nema-guide/id6746103301)

Quickly identify and cross-reference NEMA plug and receptacle configurations with detailed illustrations and specifications. This tool streamlines the process for electricians and electrical professionals by allowing searches by NEMA number or filtering by various electrical parameters.

**Highlights:** Identify NEMA plug and receptacle configurations, Search by NEMA number, Filter by voltage, amperage, phase, poles, wires, and grounding, View matching configurations instantly, Over 170 configuration illustrations, Detailed specifications for each configuration, Offline data storage

**Features:** macOS Compatibility

**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 NEMA Guide free?

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

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

NEMA Guide is rated higher. Southwire® Conversion Calc averages 4.2 out of 5 from 5 ratings, while NEMA Guide averages 5.0 from 1 ratings.

### Do Southwire® Conversion Calc or NEMA Guide have ads?

Neither Southwire® Conversion Calc nor NEMA Guide shows ads.

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

Southwire® Conversion Calc ships an update every 4 months, and NEMA Guide every 2 days. Most recently, Southwire® Conversion Calc was updated on November 6, 2026 and NEMA Guide on November 12, 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.*