# Workman's Calculator Pro vs Kopperfield

Workman's Calculator Pro and Kopperfield both sit at 4.1 stars, but that hides the real split: 67% of Workman's Calculator Pro's written reviews are positive against 0% of Kopperfield's. Workman's Calculator Pro also leads on chart position (#180 vs unranked) and ratings volume (51 vs 9). Kopperfield's advantage is price (Free vs $1.99). On rating, update cadence, ads and in-app purchases there is nothing between them.

Kopperfield is free to download; Workman's Calculator Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Workman's Calculator Pro holds the better App Store score, 4.1 against 3.9. That said, the two scores are not equally well evidenced: Workman's Calculator Pro has 51 ratings behind it against 9, so its average is the more settled of the two. Written reviews point the same way: 67% of Workman's Calculator Pro's written reviews are positive against 0% of Kopperfield's.

Workman's Calculator Pro ships an update fortnightly, Kopperfield every 3 weeks. The most recent releases landed on October 21, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Workman's Calculator Pro | Kopperfield |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.1 (51 ratings)](https://appshunter.io/ios/app/workmans-calculator-pro/id1188821288/reviews)** | [3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews) |
| Number of ratings | **51** | 9 |
| Positive reviews | **66.7% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Paid | **Ad-supported** |
| Best chart rank | **#180** | — |
| Size | 12 MB | 64 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Bret Hardman](https://appshunter.io/developer/788803580) | [Kopperfield](https://appshunter.io/developer/1756157251) |

## What reviewers say

### Workman's Calculator Pro

[App page](https://appshunter.io/ios/app/workmans-calculator-pro/id1188821288)

**Currently charting:** #180 Top Paid · Utilities (US App Store)

This construction calculator simplifies complex measurements for tradespeople. It allows simultaneous calculations in feet, inches, yards, and meters, with an intuitive interface for fractions and decimals. Get accurate results quickly to save time on the job.

**Highlights:** Simultaneous multi-unit calculations (feet, inches, yards, meters), Intuitive fraction input with dynamic button display, Handles decimal multiplication, Multiple display options (feet, inches, decimals), Designed for speed and accuracy in construction

**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 Workman's Calculator Pro free?

Workman's Calculator Pro costs $1.99, with no in-app purchases.

### Is Kopperfield free?

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

### Which has better reviews, Workman's Calculator Pro or Kopperfield?

Workman's Calculator Pro is rated higher. Workman's Calculator Pro averages 4.1 out of 5 from 51 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do Workman's Calculator Pro or Kopperfield have ads?

Neither Workman's Calculator Pro nor Kopperfield shows ads.

### Which is updated more often, Workman's Calculator Pro or Kopperfield?

Workman's Calculator Pro ships an update fortnightly, and Kopperfield every 3 weeks. Most recently, Workman's Calculator Pro was updated on October 21, 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.*