# Kopperfield vs TrueFill

The clearest difference is update cadence: Kopperfield at every 10 days against TrueFill's every 3 weeks. Kopperfield also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, 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 ships an update every 10 days, TrueFill every 3 weeks. The most recent releases landed on October 27, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Kopperfield | TrueFill |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.8 (11 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 10 days** | Every 3 weeks |
| Monetization | Ad-supported | — |
| Size | 64 MB | 6 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kopperfield](https://appshunter.io/developer/1756157251) | [Nicole Nalley](https://appshunter.io/developer/1894562817) |

## What reviewers say

### 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


### TrueFill

[App page](https://appshunter.io/ios/app/truefill-conduit-fill/id6772631228)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kopperfield free?

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

### Is TrueFill free?

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

### Do Kopperfield or TrueFill have ads?

Neither Kopperfield nor TrueFill shows ads.

### Which is updated more often, Kopperfield or TrueFill?

Kopperfield ships an update every 10 days, and TrueFill every 3 weeks. Most recently, Kopperfield was updated on October 27, 2026 and TrueFill on October 14, 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.*