# Southwire® Conversion Calc vs Transformer Calculator.

The clearest difference is rating: Transformer Calculator. at 4.8 against Southwire® Conversion Calc's 4.2. Transformer Calculator. also leads on ratings volume (47 vs 5). Southwire® Conversion Calc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Transformer Calculator. sells 1 one-off in-app purchase. Southwire® Conversion Calc asks for nothing beyond the download.

Transformer Calculator. holds the better App Store score, 4.8 against 4.2. That said, the two scores are not equally well evidenced: Transformer Calculator. has 47 ratings behind it against 5, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 4 months. The most recent releases landed on August 28, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Southwire® Conversion Calc | Transformer Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.2 (5 ratings)](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420/reviews) | **[4.8 (47 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews)** |
| Number of ratings | 5 | **47** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 7 MB | 41 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## 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


### Transformer Calculator.

[App page](https://appshunter.io/ios/app/transformer-calculator/id1506155081)

This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.

**Highlights:** Primary and secondary current calculations, Turns ratio determination, Transformer type identification, Secondary voltage calculation, Supports 1Φ and 3Φ phases, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $3.99 | one-time |


## Frequently asked questions

### Is Southwire® Conversion Calc free?

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

### Is Transformer Calculator. free?

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

### Which has better reviews, Southwire® Conversion Calc or Transformer Calculator.?

Transformer Calculator. is rated higher. Southwire® Conversion Calc averages 4.2 out of 5 from 5 ratings, while Transformer Calculator. averages 4.8 from 47 ratings.

### Do Southwire® Conversion Calc or Transformer Calculator. have ads?

Transformer Calculator. shows ads; Southwire® Conversion Calc does not.

### Which is updated more often, Southwire® Conversion Calc or Transformer Calculator.?

Southwire® Conversion Calc ships an update every 4 months, and Transformer Calculator. every 4 months. Most recently, Southwire® Conversion Calc was updated on August 28, 2026 and Transformer Calculator. on September 18, 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.*