# Duct Calculator vs Pipe Coil Development Pro

The clearest difference is price: Pipe Coil Development Pro at $3.99 against Duct Calculator's $19.99. Duct Calculator's advantage is update cadence (every 2 months vs every 41 months) and device support (4 vs 2). On ads, in-app purchases and iOS requirement there is nothing between them.

Duct Calculator costs $19.99 and Pipe Coil Development Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Duct Calculator ships an update every 2 months, Pipe Coil Development Pro every 41 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Duct Calculator | Pipe Coil Development Pro |
| --- | --- | --- |
| Price | $19.99 | **$3.99** |
| Rating | **[4.5 (189 ratings)](https://appshunter.io/ios/app/duct-calculator/id1078238132/reviews)** | — |
| Number of ratings | **189** | — |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 41 months |
| Monetization | Free | — |
| Size | 2 MB | 1 MB |
| Requires iOS | **15.0** | 16.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Pheinex, LLC](https://appshunter.io/developer/996932317) | [Imran Pinjara](https://appshunter.io/developer/1484488781) |

## What reviewers say

### Duct Calculator

[App page](https://appshunter.io/ios/app/duct-calculator/id1078238132)

This app allows HVAC professionals to quickly and accurately size new ducts or calculate the performance of existing ones. It supports both round and rectangular ductwork, offering precise calculations through direct entry or intuitive sliders. The tool provides live updates and outputs key performance metrics.

**Highlights:** Size round and rectangular ductwork, Adjust airflow, diameter, width, and height, Direct number entry for precision, Lockable dimensions for 'what-if' scenarios, Live update of calculated values, Outputs velocity and pressure drop, Supports IP and SI units

**Features:** Vision Pro support

**In-app purchases:** none


### Pipe Coil Development Pro

[App page](https://appshunter.io/ios/app/pipe-coil-development-pro/id1491738588)

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

**In-app purchases:** none


## Frequently asked questions

### Is Duct Calculator free?

Duct Calculator costs $19.99, with no in-app purchases.

### Is Pipe Coil Development Pro free?

Pipe Coil Development Pro costs $3.99, with no in-app purchases.

### Do Duct Calculator or Pipe Coil Development Pro have ads?

Neither Duct Calculator nor Pipe Coil Development Pro shows ads.

### Which is updated more often, Duct Calculator or Pipe Coil Development Pro?

Duct Calculator ships an update every 2 months, and Pipe Coil Development Pro every 41 months. Most recently, Duct Calculator was updated on November 2, 2026 and Pipe Coil Development Pro on November 3, 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.*