# ChekDuct vs DuctSizer Pro

The clearest difference is in-app purchases: ChekDuct at none against DuctSizer Pro's 1. ChekDuct also leads on device support (3 vs 1) and iOS requirement (15.1 vs 17.6). On price and ads there is nothing between them.

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

## The numbers

| Metric | ChekDuct | 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 |
| Monetization | — | Free |
| Size | 187 MB | 5 MB |
| Requires iOS | **15.1** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mohamed Kharbat](https://appshunter.io/developer/1894953065) | [LEONARDO NOVOA](https://appshunter.io/developer/6772526007) |

## What reviewers say

### ChekDuct

[App page](https://appshunter.io/ios/app/chekduct/id6768763588)

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

**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 ChekDuct free?

ChekDuct 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 ChekDuct or DuctSizer Pro have ads?

Neither ChekDuct nor DuctSizer Pro shows ads.

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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.*