# Arc Flash Label Calculator vs Kopperfield

Arc Flash Label Calculator and Kopperfield both sit at 3.8 stars, but that hides the real split: 50% of Arc Flash Label Calculator's written reviews are positive against 0% of Kopperfield's. Arc Flash Label Calculator also leads on iOS requirement (9.0 vs 15.1). Kopperfield's advantage is in-app purchases (none vs 1). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. Arc Flash Label Calculator sells 1 one-off in-app purchase. Kopperfield asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 3.8 for Arc Flash Label Calculator against 3.9 for Kopperfield. Both are backed by a comparable volume of ratings — 4 and 9 respectively. Written reviews are what separate them: 50% of Arc Flash Label Calculator's written reviews are positive against 0% of Kopperfield's.

Arc Flash Label Calculator ships an update fortnightly, Kopperfield every 3 weeks. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Arc Flash Label Calculator | Kopperfield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.8 (4 ratings)](https://appshunter.io/ios/app/arc-flash-label-calculator/id1363795374/reviews) | **[3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** |
| Number of ratings | 4 | **9** |
| Positive reviews | **50.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Free** | Ad-supported |
| Size | 20 MB | 45 MB |
| Requires iOS | **9.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Octagon Seven LLC](https://appshunter.io/developer/1200115862) | [Kopperfield](https://appshunter.io/developer/1756157251) |

## What reviewers say

### 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 |


### Kopperfield

[App page](https://appshunter.io/ios/app/kopperfield/id6736772332)

Streamline electrical design and permitting with powerful tools for load calculations, panel schedules, and single-line diagrams. Quickly reference the National Electrical Code with an AI-powered chatbot and generate instant PDF reports for inspectors and clients.

**Highlights:** Load calculator with NEC standards, Single line diagram tool, Panel schedule creation, NEC chatbot, Instant PDF report generation, AI panel photo processing, Team dashboard

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Arc Flash Label Calculator free?

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

### Is Kopperfield free?

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

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

Kopperfield is rated higher. Arc Flash Label Calculator averages 3.8 out of 5 from 4 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Arc Flash Label Calculator or Kopperfield have ads?

Neither Arc Flash Label Calculator nor Kopperfield shows ads.

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

Arc Flash Label Calculator ships an update fortnightly, and Kopperfield every 3 weeks. Most recently, Arc Flash Label Calculator was updated on October 6, 2026 and Kopperfield on October 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.*