# Box Fill Calc vs Kopperfield

The clearest difference is review sentiment: Box Fill Calc at 60% against Kopperfield's 0%. Box Fill Calc also leads on iOS requirement (8.0 vs 15.1). Kopperfield's advantage is price (Free vs $4.99) and rating (3.8 vs 3.2). On ratings volume, ads, in-app purchases and device support there is nothing between them.

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

Kopperfield holds the better App Store score, 3.8 against 3.2. Both are backed by a comparable volume of ratings — 5 and 11 respectively. Written reviews complicate that: 60% of Box Fill Calc'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 Calc ships an update every 3 months, Kopperfield fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Box Fill Calc | Kopperfield |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [3.2 (5 ratings)](https://appshunter.io/ios/app/box-fill-calc/id895211266/reviews) | **[3.8 (11 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** |
| Number of ratings | 5 | **11** |
| Positive reviews | **60.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Fortnightly** |
| Monetization | Paid | **Ad-supported** |
| Size | 18 MB | 64 MB |
| Requires iOS | **8.0** | 15.1 |
| Devices | iPhone, iPad, iPod | 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 Calc

[App page](https://appshunter.io/ios/app/box-fill-calc/id895211266)

This app simplifies electrical box fill calculations for any job size. It allows users to create and save unlimited calculations, solve for various box sizes, and export results to spreadsheets or print directly. It supports current electrical code standards and includes a built-in construction calculator.

**Highlights:** Unlimited saved calculations, Solve for custom and compound boxes, Export results to spreadsheet, Direct printing via AirPrint, Supports 2014 NEC and 2012, Built-in construction calculator

**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 Calc free?

Box Fill Calc costs $4.99, with no in-app purchases.

### Is Kopperfield free?

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

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

Kopperfield is rated higher. Box Fill Calc averages 3.2 out of 5 from 5 ratings, while Kopperfield averages 3.8 from 11 ratings.

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

Neither Box Fill Calc nor Kopperfield shows ads.

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

Box Fill Calc ships an update every 3 months, and Kopperfield fortnightly. Most recently, Box Fill Calc was updated on October 24, 2026 and Kopperfield on October 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.*