# ViDiLabs Calc vs Kopperfield

The clearest difference is price: Kopperfield at Free against ViDiLabs Calc's $18.99. Kopperfield also leads on rating (3.9 vs 3.0) and update cadence (every 3 weeks vs every 4 months). ViDiLabs Calc's advantage is iOS requirement (12.0 vs 15.1). On ads, in-app purchases and device support there is nothing between them.

Kopperfield is free to download; ViDiLabs Calc costs $18.99 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 3.0. That said, the two scores are not equally well evidenced: Kopperfield has 9 ratings behind it against 1, so its average is the more settled of the two.

ViDiLabs Calc ships an update every 4 months, Kopperfield every 3 weeks. The most recent releases landed on October 2, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | ViDiLabs Calc | Kopperfield |
| --- | --- | --- |
| Price | $18.99 | **Free** |
| Rating | [3.0 (1 ratings)](https://appshunter.io/ios/app/vidilabs-calc/id1054879397/reviews) | **[3.9 (9 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** |
| Number of ratings | 1 | **9** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Paid | **Ad-supported** |
| Size | 9 MB | 64 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ViDi Labs Pty Ltd](https://appshunter.io/developer/1054879396) | [Kopperfield](https://appshunter.io/developer/1756157251) |

## What reviewers say

### ViDiLabs Calc

[App page](https://appshunter.io/ios/app/vidilabs-calc/id1054879397)

This app calculates necessary camera lens focal lengths and object distances for optimal pixel density, aiding in compliance with surveillance standards. It also estimates storage capacity for video recordings and helps analyze moving object blur for clearer image capture.

**Highlights:** Calculate required focal length and object distance, Determine required storage capacity, Pixel density calculation for identification and recognition, Database of commercially available sensors, Manual entry for custom variables, Moving object blur analysis, Pre-set pixel densities for common projects

**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 ViDiLabs Calc free?

ViDiLabs Calc costs $18.99, with no in-app purchases.

### Is Kopperfield free?

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

### Which has better reviews, ViDiLabs Calc or Kopperfield?

Kopperfield is rated higher. ViDiLabs Calc averages 3.0 out of 5 from 1 ratings, while Kopperfield averages 3.9 from 9 ratings.

### Do ViDiLabs Calc or Kopperfield have ads?

Neither ViDiLabs Calc nor Kopperfield shows ads.

### Which is updated more often, ViDiLabs Calc or Kopperfield?

ViDiLabs Calc ships an update every 4 months, and Kopperfield every 3 weeks. Most recently, ViDiLabs Calc was updated on October 2, 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.*