# Kopperfield vs Electrical Calculator

The clearest difference is price: Kopperfield at Free against Electrical Calculator's $4.99. Kopperfield also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (15.1 vs 17.0). Electrical Calculator's advantage is chart position (#189 vs unranked). On ads, in-app purchases and device support there is nothing between them.

Kopperfield is free to download; Electrical Calculator costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kopperfield ships an update every 3 weeks, Electrical Calculator every 3 months. The most recent releases landed on August 21, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Kopperfield | Electrical Calculator |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** | — |
| Number of ratings | **9** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | Ad-supported | — |
| Best chart rank | — | **#189** |
| Size | 45 MB | 1 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kopperfield, Inc.](https://appshunter.io/developer/1756157251) | [Shanghai Sheyuan Network Technology Co., Ltd.](https://appshunter.io/developer/1560626858) |

## What reviewers say

### 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


### Electrical Calculator

[App page](https://appshunter.io/ios/app/electrical-calculator-panel/id6761541388)

**Currently charting:** #189 Top Paid · Utilities (US App Store)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kopperfield free?

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

### Is Electrical Calculator free?

Electrical Calculator costs $4.99, with no in-app purchases.

### Do Kopperfield or Electrical Calculator have ads?

Neither Kopperfield nor Electrical Calculator shows ads.

### Which is updated more often, Kopperfield or Electrical Calculator?

Kopperfield ships an update every 3 weeks, and Electrical Calculator every 3 months. Most recently, Kopperfield was updated on August 21, 2026 and Electrical Calculator on September 24, 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.*