# Fault Current Calculator vs QR Xpert

The clearest difference is rating: QR Xpert at 4.2 against Fault Current Calculator's 3.0. QR Xpert also leads on in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 4 months). Fault Current Calculator's advantage is ratings volume (27 vs 6). On price, ads and device support there is nothing between them.

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

QR Xpert holds the better App Store score, 4.2 against 3.0. Both are backed by a comparable volume of ratings — 27 and 6 respectively.

Fault Current Calculator ships an update every 4 months, QR Xpert every 3 weeks. The most recent releases landed on October 23, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | QR Xpert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (27 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[4.2 (6 ratings)](https://appshunter.io/ios/app/qr-xpert/id1461422339/reviews)** |
| Number of ratings | **27** | 6 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 28 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [Tomarco Contractor Specialties, Inc](https://appshunter.io/developer/1454420483) |

## 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 |


### QR Xpert

[App page](https://appshunter.io/ios/app/qr-xpert/id1461422339)

This app helps construction professionals understand and verify seismic bracing installations. It provides project-specific requirements and quality assurance status by scanning QR codes on bracing kits and tags.

**Highlights:** Project-specific seismic installation requirements, Quality assurance approval status, QR code scanning for bracing kits, Real-time QA reports, Streamlined construction process, Enhanced field transparency

**Features:** macOS Compatibility

**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 QR Xpert free?

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

### Which has better reviews, Fault Current Calculator or QR Xpert?

QR Xpert is rated higher. Fault Current Calculator averages 3.0 out of 5 from 27 ratings, while QR Xpert averages 4.2 from 6 ratings.

### Do Fault Current Calculator or QR Xpert have ads?

Neither Fault Current Calculator nor QR Xpert shows ads.

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

Fault Current Calculator ships an update every 4 months, and QR Xpert every 3 weeks. Most recently, Fault Current Calculator was updated on October 23, 2026 and QR Xpert on October 29, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*