# Fault Current Calculator vs Eyrus

The clearest difference is rating: Eyrus at 5.0 against Fault Current Calculator's 3.1. Eyrus also leads on in-app purchases (none vs 2) and update cadence (monthly vs every 4 months). Fault Current Calculator's advantage is ratings volume (23 vs 1). On price, ads, device support and iOS requirement there is nothing between them.

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

Eyrus holds the better App Store score, 5.0 against 3.1. That said, the two scores are not equally well evidenced: Fault Current Calculator has 23 ratings behind it against 1, so its average is the more settled of the two.

Fault Current Calculator ships an update every 4 months, Eyrus monthly. The most recent releases landed on October 2, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | Eyrus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.1 (23 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/eyrus/id1627024083/reviews)** |
| Number of ratings | **23** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 14 MB |
| Requires iOS | 14.0 | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [Eyrus](https://appshunter.io/developer/1477751540) |

## 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 |


### Eyrus

[App page](https://appshunter.io/ios/app/eyrus/id1627024083)

This app simplifies workforce management by providing automatic check-in/out, timesheet viewing, and profile updates for tradespeople. It allows easy project registration via QR code scanning and streamlines document review and submission.

**Highlights:** Automatic job site check-in/out, View timesheets, Update profile and certifications, QR code project registration, Digital document signing, Workforce visibility

**Features:** Apple Wallet

**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 Eyrus free?

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

### Which has better reviews, Fault Current Calculator or Eyrus?

Eyrus is rated higher. Fault Current Calculator averages 3.1 out of 5 from 23 ratings, while Eyrus averages 5.0 from 1 ratings.

### Do Fault Current Calculator or Eyrus have ads?

Neither Fault Current Calculator nor Eyrus shows ads.

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

Fault Current Calculator ships an update every 4 months, and Eyrus monthly. Most recently, Fault Current Calculator was updated on October 2, 2026 and Eyrus on September 30, 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.*