# SMACNA Duct vs Unitize

The clearest difference is iOS requirement: Unitize at 13.0 against SMACNA Duct's 16.2. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | SMACNA Duct | Unitize |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/smacna-duct-u-lator/id6702024229/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 6 days |
| Monetization | Free | — |
| Size | 3 MB | 35 MB |
| Requires iOS | 16.2 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.](https://appshunter.io/developer/427624079) | [TechnoYug Technologies LLP](https://appshunter.io/developer/1475118645) |

## What reviewers say

### SMACNA Duct

[App page](https://appshunter.io/ios/app/smacna-duct-u-lator/id6702024229)

This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.

**Highlights:** Rectangular, round, and oval duct sizing, Real-time calculation updates, Converts duct shapes and sizes, Calculates friction loss, Determines sizes for given velocity, User-friendly interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Unitize

[App page](https://appshunter.io/ios/app/unitize/id6758343871)

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

**In-app purchases:** none


## Frequently asked questions

### Is SMACNA Duct free?

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

### Is Unitize free?

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

### Do SMACNA Duct or Unitize have ads?

Neither SMACNA Duct nor Unitize 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.*