# Box Fill 2 vs Kopperfield

The clearest difference is price: Kopperfield at Free against Box Fill 2's $3.99. Kopperfield also leads on rating (3.9 vs 3.3) and ratings volume (9 vs 3). Box Fill 2's advantage is review sentiment (33% vs 0%). On update cadence, ads, in-app purchases and device support there is nothing between them.

Kopperfield is free to download; Box Fill 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kopperfield holds the better App Store score, 3.9 against 3.3. Both are backed by a comparable volume of ratings — 3 and 9 respectively. Written reviews complicate that: 33% of Box Fill 2'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.

Box Fill 2 ships an update every 5 weeks, Kopperfield every 3 weeks. The most recent releases landed on August 27, 2026 and August 21, 2026 respectively.

## The numbers

| Metric | Box Fill 2 | Kopperfield |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/box-fill-2/id1589765411/reviews) | **[3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** |
| Number of ratings | 3 | **9** |
| Positive reviews | **33.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Paid | **Ad-supported** |
| Size | 19 MB | 45 MB |
| Requires iOS | 26.0 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Kopperfield, Inc.](https://appshunter.io/developer/1756157251) |

## What reviewers say

### Box Fill 2

[App page](https://appshunter.io/ios/app/box-fill-2/id1589765411)

This utility app helps electricians and contractors perform precise electrical box fill calculations according to the latest codes. It also includes a comprehensive construction calculator for dimensional math, area, volume, and right-angle solutions.

**Highlights:** Electrical box fill calculations, Construction calculator, Dimensional math (feet-inches-fractions, metric), Area and volume calculations, Right-angle solutions, Shareable calculation reports, iCloud sync across devices

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

**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 Box Fill 2 free?

Box Fill 2 costs $3.99, with no in-app purchases.

### Is Kopperfield free?

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

### Which has better reviews, Box Fill 2 or Kopperfield?

Kopperfield is rated higher. Box Fill 2 averages 3.3 out of 5 from 3 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Box Fill 2 or Kopperfield have ads?

Neither Box Fill 2 nor Kopperfield shows ads.

### Which is updated more often, Box Fill 2 or Kopperfield?

Box Fill 2 ships an update every 5 weeks, and Kopperfield every 3 weeks. Most recently, Box Fill 2 was updated on August 27, 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.*