# Orifice Flow Rate Calculator vs Kopperfield

The clearest difference is review sentiment: Orifice Flow Rate Calculator at 100% against Kopperfield's 0%. Orifice Flow Rate Calculator also leads on rating (4.9 vs 3.8) and ratings volume (113 vs 11). Kopperfield's advantage is update cadence (every 10 days vs every 6 months). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Orifice Flow Rate Calculator holds the better App Store score, 4.9 against 3.8. That said, the two scores are not equally well evidenced: Orifice Flow Rate Calculator has 113 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 100% of Orifice Flow Rate Calculator's written reviews are positive against 0% of Kopperfield's.

Orifice Flow Rate Calculator ships an update every 6 months, Kopperfield every 10 days. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Orifice Flow Rate Calculator | Kopperfield |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (113 ratings)](https://appshunter.io/ios/app/orifice-flow-rate-calculator/id1439701941/reviews)** | [3.8 (11 ratings)](https://appshunter.io/ios/app/kopperfield/id6736772332/reviews) |
| Number of ratings | **113** | 11 |
| Positive reviews | **100.0% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 10 days** |
| Monetization | **Free** | Ad-supported |
| Size | 2 MB | 64 MB |
| Requires iOS | 15.6 | **15.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [R.L. Laughlin & Company, Inc.](https://appshunter.io/developer/1438670681) | [Kopperfield](https://appshunter.io/developer/1756157251) |

## What reviewers say

### Orifice Flow Rate Calculator

[App page](https://appshunter.io/ios/app/orifice-flow-rate-calculator/id1439701941)

Easily calculate natural gas orifice flow rates using the AGA 3 standard. This utility app allows users to determine MCF production for a given duration, save calculations, and export data to CSV. It functions offline, requiring no cell service.

**Highlights:** Orifice MCF Calculator, Rotary (Direct) MCF Calculator, Save all calculations, View saved inputs and calculations, Export calculations to CSV

**Features:** macOS Compatibility

**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 Orifice Flow Rate Calculator free?

Orifice Flow Rate Calculator is free to download, with no in-app purchases.

### Is Kopperfield free?

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

### Which has better reviews, Orifice Flow Rate Calculator or Kopperfield?

Orifice Flow Rate Calculator is rated higher. Orifice Flow Rate Calculator averages 4.9 out of 5 from 113 ratings, while Kopperfield averages 3.8 from 11 ratings.

### Do Orifice Flow Rate Calculator or Kopperfield have ads?

Neither Orifice Flow Rate Calculator nor Kopperfield shows ads.

### Which is updated more often, Orifice Flow Rate Calculator or Kopperfield?

Orifice Flow Rate Calculator ships an update every 6 months, and Kopperfield every 10 days. Most recently, Orifice Flow Rate Calculator was updated on October 24, 2026 and Kopperfield on October 27, 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.*