# Kopperfield vs MasterElec

The clearest difference is rating: MasterElec at 5.0 against Kopperfield's 3.9. Kopperfield's advantage is in-app purchases (none vs 2) and update cadence (every 3 weeks vs every 3 months). On price, ratings volume, ads and device support there is nothing between them.

Both are free to download. MasterElec sells 2 in-app purchases, starting at $4.99 per 7 days. Kopperfield asks for nothing beyond the download.

MasterElec holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 9 and 4 respectively.

Kopperfield ships an update every 3 weeks, MasterElec every 3 months. The most recent releases landed on October 3, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | Kopperfield | MasterElec |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/masterelec-nec-code-guide/id6760912109/reviews)** |
| Number of ratings | **9** | 4 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 3 months |
| Monetization | **Ad-supported** | Freemium |
| Size | 45 MB | 28 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Kopperfield](https://appshunter.io/developer/1756157251) | [TWOSCRIPTS LABS INC.](https://appshunter.io/developer/1861222980) |

## 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


### MasterElec

[App page](https://appshunter.io/ios/app/masterelec-nec-code-guide/id6760912109)

A voice-powered assistant for electricians that provides offline access to NEC references and professional calculators. Quickly get answers to code questions and perform calculations without needing an internet connection.

**Highlights:** Voice-first interface for queries, 100% offline functionality, NEC reference access, Professional electrical calculators, Bookmark and export calculations, Free daily voice queries

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Susbcription | $4.99 | per 7 days |
| Annual Subscription | $39.99 | per year |


## Frequently asked questions

### Is Kopperfield free?

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

### Is MasterElec free?

MasterElec is free to download, with in-app purchases available.

### Which has better reviews, Kopperfield or MasterElec?

MasterElec is rated higher. Kopperfield averages 3.9 out of 5 from 9 ratings, while MasterElec averages 5.0 from 4 ratings.

### Do Kopperfield or MasterElec have ads?

Neither Kopperfield nor MasterElec shows ads.

### Which is updated more often, Kopperfield or MasterElec?

Kopperfield ships an update every 3 weeks, and MasterElec every 3 months. Most recently, Kopperfield was updated on October 3, 2026 and MasterElec on October 10, 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.*