# Building Wire Selector vs Kopperfield

The clearest difference is review sentiment: Building Wire Selector at 100% against Kopperfield's 0%. Building Wire Selector also leads on rating (5.0 vs 3.9) and monetization model (free vs ad-supported). Kopperfield's advantage is update cadence (every 3 weeks vs every 5 months) and ratings volume (9 vs 2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Building Wire Selector holds the better App Store score, 5.0 against 3.9. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews point the same way: 100% of Building Wire Selector's written reviews are positive against 0% of Kopperfield's.

Building Wire Selector ships an update every 5 months, Kopperfield every 3 weeks. The most recent releases landed on August 30, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Building Wire Selector | Kopperfield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/building-wire-selector/id6670218338/reviews)** | [3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews) |
| Number of ratings | 2 | **9** |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 6 MB | 45 MB |
| Requires iOS | 16.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Kopperfield, Inc.](https://appshunter.io/developer/1756157251) |

## What reviewers say

### Building Wire Selector

[App page](https://appshunter.io/ios/app/building-wire-selector/id6670218338)

This tool helps determine the correct conductor size and wire type for electrical installations. It adheres to the National Electrical Code® wiring methods, ensuring compliance and safety.

**Highlights:** Conductor size determination, Wire and cable type selection, National Electrical Code compliance, Electrical installation guidance

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 Building Wire Selector free?

Building Wire Selector is free to download, with no in-app purchases.

### Is Kopperfield free?

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

### Which has better reviews, Building Wire Selector or Kopperfield?

Building Wire Selector is rated higher. Building Wire Selector averages 5.0 out of 5 from 2 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Building Wire Selector or Kopperfield have ads?

Neither Building Wire Selector nor Kopperfield shows ads.

### Which is updated more often, Building Wire Selector or Kopperfield?

Building Wire Selector ships an update every 5 months, and Kopperfield every 3 weeks. Most recently, Building Wire Selector was updated on August 30, 2026 and Kopperfield on August 21, 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.*