# Fault Current Calculator vs Arc Flash Label Calculator

The clearest difference is review sentiment: Arc Flash Label Calculator at 50% against Fault Current Calculator's 0%. Arc Flash Label Calculator also leads on rating (3.5 vs 3.0) and update cadence (fortnightly vs every 4 months). Fault Current Calculator's advantage is ratings volume (27 vs 6). On price, ads, in-app purchases 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 and Arc Flash Label Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Arc Flash Label Calculator holds the better App Store score, 3.5 against 3.0. Both are backed by a comparable volume of ratings — 27 and 6 respectively. Written reviews point the same way: 0% of Fault Current Calculator's written reviews are positive against 50% of Arc Flash Label Calculator's.

Fault Current Calculator ships an update every 4 months, Arc Flash Label Calculator fortnightly. The most recent releases landed on November 1, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | Fault Current Calculator | Arc Flash Label Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (27 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[3.5 (6 ratings)](https://appshunter.io/ios/app/arc-flash-label-calculator/id1363795374/reviews)** |
| Number of ratings | **27** | 6 |
| Positive reviews | 0.0% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Freemium | **Free** |
| Size | 25 MB | 20 MB |
| Requires iOS | 14.0 | **9.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [Octagon Seven LLC](https://appshunter.io/developer/1200115862) |

## 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 |


### Arc Flash Label Calculator

[App page](https://appshunter.io/ios/app/arc-flash-label-calculator/id1363795374)

Calculate and generate arc flash labels for electrical equipment. Input data to produce PDF labels based on NFPA 70E standards, including incident energy and approach boundaries. Supports various circuit breakers, fuses, and voltage levels.

**Highlights:** Arc flash label calculation, NFPA 70E Annex D.4 methodology, Support for MCCB, ICCB, LSI, and fuses, Calculates Incident Energy, Arc Flash Boundary, Approach Boundaries, Generates PDF labels (4 per sheet), Supports low, medium, and high voltage equipment, Custom configurations for gap, distance, and time

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock High Voltage Arc Flash | $19.99 | one-time |


## Frequently asked questions

### Is Fault Current Calculator free?

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

### Is Arc Flash Label Calculator free?

Arc Flash Label Calculator is free to download, with in-app purchases available.

### Which has better reviews, Fault Current Calculator or Arc Flash Label Calculator?

Arc Flash Label Calculator is rated higher. Fault Current Calculator averages 3.0 out of 5 from 27 ratings, while Arc Flash Label Calculator averages 3.5 from 6 ratings.

### Do Fault Current Calculator or Arc Flash Label Calculator have ads?

Neither Fault Current Calculator nor Arc Flash Label Calculator shows ads.

### Which is updated more often, Fault Current Calculator or Arc Flash Label Calculator?

Fault Current Calculator ships an update every 4 months, and Arc Flash Label Calculator fortnightly. Most recently, Fault Current Calculator was updated on November 1, 2026 and Arc Flash Label Calculator on November 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.*