# Southwire® Voltage Drop Calc vs Ferret Tools

The clearest difference is rating: Southwire® Voltage Drop Calc at 4.6 against Ferret Tools's 3.1. Southwire® Voltage Drop Calc also leads on ratings volume (1.5K vs 23) and review sentiment (49% vs 27%). On price, update cadence, ads and in-app purchases there is nothing between them.

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

Southwire® Voltage Drop Calc holds the better App Store score, 4.6 against 3.1. That said, the two scores are not equally well evidenced: Southwire® Voltage Drop Calc has 1.5K ratings behind it against 23, so its average is the more settled of the two. Written reviews point the same way: 49% of Southwire® Voltage Drop Calc's written reviews are positive against 27% of Ferret Tools's.

Southwire® Voltage Drop Calc ships an update every 2 months, Ferret Tools every 6 weeks. The most recent releases landed on November 6, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Southwire® Voltage Drop Calc | Ferret Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (1.5K ratings)](https://appshunter.io/ios/app/southwire-voltage-drop-calc/id440338420/reviews)** | [3.1 (23 ratings)](https://appshunter.io/ios/app/ferret-tools/id1275320105/reviews) |
| Number of ratings | **1.5K** | 23 |
| Positive reviews | **49.1% of reviews** | 26.9% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Free | Free |
| Size | 10 MB | 31 MB |
| Requires iOS | 15.0 | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [The Cable Ferret Company Limited](https://appshunter.io/developer/1315506831) |

## What reviewers say

### Southwire® Voltage Drop Calc

[App page](https://appshunter.io/ios/app/southwire-voltage-drop-calc/id440338420)

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

**Highlights:** Determine wire size for voltage drop, Calculate voltage drop for conductor runs, Limit wire size by voltage drop, Limit wire size by NEC ampacity, Supports AWG and KCMIL sizes

**Features:** macOS Compatibility

**In-app purchases:** none

**What reviewers like**

- 🚀 Quick and useful
- 🚀 Great Quick Reference
- 👍 A must have app for electricians
- 👍 Love These
- 👍 Electrical Engineer

**What reviewers complain about**

- 🐛 Motor starting Voltage drop
- 🐛 Useless!
- 🐛 Won't work
- 🐛 How to use
- 🐛 Confused

**Reported bugs**

- Useless!
- Won't work
- How to use
- Confused
- Bad app

**Requested features**

- Motor starting Voltage drop calculation
- Metric wire size options


### Ferret Tools

[App page](https://appshunter.io/ios/app/ferret-tools/id1275320105)

View and record live video from your inspection camera. This app allows you to capture photos and videos of hard-to-reach areas. Requires a separate Ferret inspection camera to function.

**Highlights:** Live video streaming, Photo capture, Video recording, Inspection camera control

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Southwire® Voltage Drop Calc free?

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

### Is Ferret Tools free?

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

### Which has better reviews, Southwire® Voltage Drop Calc or Ferret Tools?

Southwire® Voltage Drop Calc is rated higher. Southwire® Voltage Drop Calc averages 4.6 out of 5 from 1.5K ratings, while Ferret Tools averages 3.1 from 23 ratings.

### Do Southwire® Voltage Drop Calc or Ferret Tools have ads?

Neither Southwire® Voltage Drop Calc nor Ferret Tools shows ads.

### Which is updated more often, Southwire® Voltage Drop Calc or Ferret Tools?

Southwire® Voltage Drop Calc ships an update every 2 months, and Ferret Tools every 6 weeks. Most recently, Southwire® Voltage Drop Calc was updated on November 6, 2026 and Ferret Tools on November 3, 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.*