# DuctPro vs DuctSizer Pro

The clearest difference is in-app purchases: DuctPro at none against DuctSizer Pro's 1. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. DuctSizer Pro sells 1 one-off in-app purchase. DuctPro asks for nothing beyond the download.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on September 19, 2026 and August 7, 2026 respectively.

## The numbers

| Metric | DuctPro | DuctSizer Pro |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/ductsizer-pro/id6772545249/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | — | Free |
| Size | 3 MB | 5 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [High Intent Labs](https://appshunter.io/developer/6771761657) | [LEONARDO NOVOA](https://appshunter.io/developer/6772526007) |

## What reviewers say

### DuctPro

[App page](https://appshunter.io/ios/app/ductpro/id6771761655)

**Features:** macOS Compatibility

**In-app purchases:** none


### DuctSizer Pro

[App page](https://appshunter.io/ios/app/ductsizer-pro/id6772545249)

This tool quickly calculates HVAC duct sizes based on airflow and friction loss. It supports various duct shapes and provides key airflow values for field use.

**Highlights:** Calculate CFM from duct size, Find duct sizes from CFM, Supports square, round, and oval duct, Shows velocity, friction, area, and equivalent round size, Highlights suggested duct sizes, Compares alternate duct sizes

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Catalog Pro | $2.99 | one-time |


## Frequently asked questions

### Is DuctPro free?

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

### Is DuctSizer Pro free?

DuctSizer Pro is free to download, with in-app purchases available.

### Do DuctPro or DuctSizer Pro have ads?

Neither DuctPro nor DuctSizer Pro shows ads.

### Which is updated more often, DuctPro or DuctSizer Pro?

DuctPro ships an update weekly, and DuctSizer Pro weekly. Most recently, DuctPro was updated on September 19, 2026 and DuctSizer Pro on August 7, 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.*