# Partial Reel Calculator vs Kopperfield

The clearest difference is review sentiment: Partial Reel Calculator at 44% against Kopperfield's 0%. Partial Reel Calculator also leads on monetization model (free vs ad-supported). Kopperfield's advantage is rating (3.9 vs 2.4) and update cadence (every 3 weeks vs every 4 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

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

Kopperfield holds the better App Store score, 3.9 against 2.4. Both are backed by a comparable volume of ratings — 14 and 9 respectively. Written reviews complicate that: 44% of Partial Reel Calculator's written reviews are positive against 0% of Kopperfield's, so the app with the better star average is not the one people write more warmly about.

Partial Reel Calculator ships an update every 4 months, Kopperfield every 3 weeks. The most recent releases landed on October 3, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Partial Reel Calculator | Kopperfield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.4 (14 ratings)](https://appshunter.io/ios/app/partial-reel-calculator/id489177969/reviews) | **[3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** |
| Number of ratings | **14** | 9 |
| Positive reviews | **44.4% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | **Free** | Ad-supported |
| Size | 11 MB | 64 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](https://appshunter.io/developer/1756157251) |

## What reviewers say

### Partial Reel Calculator

[App page](https://appshunter.io/ios/app/partial-reel-calculator/id489177969)

This utility app helps estimate the remaining wire or cable footage on a reel. It comes preloaded with common cables and reels, and allows users to create custom favorites for quick access.

**Highlights:** Estimates wire/cable footage on reels, Preloaded with common cables and reels, Create custom favorite cables and reels, Available for iPad and iPhone

**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 Partial Reel Calculator free?

Partial Reel Calculator 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, Partial Reel Calculator or Kopperfield?

Kopperfield is rated higher. Partial Reel Calculator averages 2.4 out of 5 from 14 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Partial Reel Calculator or Kopperfield have ads?

Neither Partial Reel Calculator nor Kopperfield shows ads.

### Which is updated more often, Partial Reel Calculator or Kopperfield?

Partial Reel Calculator ships an update every 4 months, and Kopperfield every 3 weeks. Most recently, Partial Reel Calculator was updated on October 3, 2026 and Kopperfield on October 20, 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.*