# Ohms Law Calc. vs Southwire® Conversion Calc

The clearest difference is review sentiment: Ohms Law Calc. at 50% against Southwire® Conversion Calc's 0%. Ohms Law Calc. also leads on rating (4.7 vs 4.2) and ratings volume (1.3K vs 5). Southwire® Conversion Calc's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

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

Ohms Law Calc. holds the better App Store score, 4.7 against 4.2. That said, the two scores are not equally well evidenced: Ohms Law Calc. has 1.3K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 50% of Ohms Law Calc.'s written reviews are positive against 0% of Southwire® Conversion Calc's.

Ohms Law Calc. ships an update every 2 months, Southwire® Conversion Calc every 4 months. The most recent releases landed on October 27, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Ohms Law Calc. | Southwire® Conversion Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (1.3K ratings)](https://appshunter.io/ios/app/ohms-law-calc/id491898006/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/southwire-conversion-calc/id545756420/reviews) |
| Number of ratings | **1.3K** | 5 |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 2 months** | Every 4 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 59 MB | 7 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Ohms Law Calc.

[App page](https://appshunter.io/ios/app/ohms-law-calc/id491898006)

This app provides a comprehensive suite of electrical calculations, including Ohm's Law, voltage drop, wire sizing, and impedance. It also offers numerous converters for various electrical units and parameters, aiding in circuit design and analysis.

**Highlights:** Ohm's Law calculations, Voltage drop calculator, Wire size calculator, Impedance calculations (R, L, C), Electrical unit converters, Power and current conversions, Circuit design tools

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ohms Law Calc. | $3.99 | one-time |

**What reviewers like**

- 🚀 Great value
- 🚀 Works perfectly
- 🚀 Fantastic app
- 👍 Best thing since sliced bread
- 🚀 Useful for electrical work

**What reviewers complain about**

- 👎 Have to pay again for an app already purchased
- 👎 Not easy to use
- 🐛 Paid but not unlocked, no response from developer
- 👎 Annoying pop-ups
- 🐛 Keeps shutting down

**Reported bugs**

- Paid version not unlocking
- Repeatedly prompting for payment after already paid
- Keyboard overlaying results making it difficult to see

**Requested features**

- Add more electrical conversions and calculations
- Add ability to input voltage and resistance to get amps and watts
- Add kVA, rms, and other popular needed conversions


### 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


## Frequently asked questions

### Is Ohms Law Calc. free?

Ohms Law Calc. is free to download, with in-app purchases available.

### Is Southwire® Conversion Calc free?

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

### Which has better reviews, Ohms Law Calc. or Southwire® Conversion Calc?

Ohms Law Calc. is rated higher. Ohms Law Calc. averages 4.7 out of 5 from 1.3K ratings, while Southwire® Conversion Calc averages 4.2 from 5 ratings.

### Do Ohms Law Calc. or Southwire® Conversion Calc have ads?

Ohms Law Calc. shows ads; Southwire® Conversion Calc does not.

### Which is updated more often, Ohms Law Calc. or Southwire® Conversion Calc?

Ohms Law Calc. ships an update every 2 months, and Southwire® Conversion Calc every 4 months. Most recently, Ohms Law Calc. was updated on October 27, 2026 and Southwire® Conversion Calc on October 2, 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.*