# Duct Calculator vs Pump Power

The clearest difference is price: Pump Power at $1.99 against Duct Calculator's $19.99. Duct Calculator's advantage is update cadence (every 2 months vs every 56 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 Pump Power $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Duct Calculator ships an update every 2 months, Pump Power every 56 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Duct Calculator | Pump Power |
| --- | --- | --- |
| Price | $19.99 | **$1.99** |
| 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 56 months |
| Monetization | Free | — |
| Size | 2 MB | 2 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


### Pump Power

[App page](https://appshunter.io/ios/app/pump-power/id1490692755)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Duct Calculator free?

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

### Is Pump Power free?

Pump Power costs $1.99, with no in-app purchases.

### Do Duct Calculator or Pump Power have ads?

Neither Duct Calculator nor Pump Power shows ads.

### Which is updated more often, Duct Calculator or Pump Power?

Duct Calculator ships an update every 2 months, and Pump Power every 56 months. Most recently, Duct Calculator was updated on November 2, 2026 and Pump Power 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.*