# DuctSizer Pro vs HVAC Duct Calculator

The clearest difference is device support: HVAC Duct Calculator at 3 against DuctSizer Pro's 1. HVAC Duct Calculator also leads on iOS requirement (15.0 vs 17.6). On price, ads and in-app purchases there is nothing between them.

Both are free to download. DuctSizer Pro sells 1 one-off in-app purchase and HVAC Duct Calculator sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | DuctSizer Pro | HVAC Duct Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/ductsizer-pro/id6772545249/reviews)** | — |
| Number of ratings | **3** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | — |
| Monetization | Free | — |
| Size | 5 MB | 8 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [LEONARDO NOVOA](https://appshunter.io/developer/6772526007) | [MEP TASARIM MUHENDISLIK VE MUSAVIRLIK LIMITED SIRKETI](https://appshunter.io/developer/6780602473) |

## What reviewers say

### 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 |


### HVAC Duct Calculator

[App page](https://appshunter.io/ios/app/hvac-duct-calculator/id6780602471)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime VIP | $3.99 | one-time |


## Frequently asked questions

### Is DuctSizer Pro free?

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

### Is HVAC Duct Calculator free?

HVAC Duct Calculator is free to download, with in-app purchases available.

### Do DuctSizer Pro or HVAC Duct Calculator have ads?

Neither DuctSizer Pro nor HVAC Duct Calculator shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*