# Fault Current Calculator vs Ferret Tools

The clearest difference is in-app purchases: Ferret Tools at none against Fault Current Calculator's 2. Ferret Tools also leads on review sentiment (27% vs 0%) and update cadence (every 6 weeks vs every 4 months). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month. Ferret Tools asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.1 for Fault Current Calculator against 3.1 for Ferret Tools. Both are backed by a comparable volume of ratings — 23 and 23 respectively. Written reviews are what separate them: 0% of Fault Current Calculator's written reviews are positive against 27% of Ferret Tools's.

Fault Current Calculator ships an update every 4 months, Ferret Tools every 6 weeks. The most recent releases landed on August 20, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | Ferret Tools |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (23 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | [3.1 (23 ratings)](https://appshunter.io/ios/app/ferret-tools/id1275320105/reviews) |
| Number of ratings | 23 | 23 |
| Positive reviews | 0.0% of reviews | **26.9% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 weeks** |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 31 MB |
| Requires iOS | **14.0** | 15 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [The Cable Ferret Company Limited](https://appshunter.io/developer/1315506831) |

## What reviewers say

### Fault Current Calculator

[App page](https://appshunter.io/ios/app/fault-current-calculator/id647477910)

This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.

**Highlights:** Calculate available fault current, Size fuses and conductors, Generate service equipment labels, Single and three-phase system support, NEC® 110.24 compliance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Subscription | $39.99 | per year |


### 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 Fault Current Calculator free?

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

### Is Ferret Tools free?

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

### Which has better reviews, Fault Current Calculator or Ferret Tools?

Fault Current Calculator and Ferret Tools are both rated 3.1 out of 5 on the App Store, from 23 and 23 ratings respectively.

### Do Fault Current Calculator or Ferret Tools have ads?

Neither Fault Current Calculator nor Ferret Tools shows ads.

### Which is updated more often, Fault Current Calculator or Ferret Tools?

Fault Current Calculator ships an update every 4 months, and Ferret Tools every 6 weeks. Most recently, Fault Current Calculator was updated on August 20, 2026 and Ferret Tools on September 25, 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.*