# DuctSizer Pro

> HVAC duct sizing calculator for field use. (iPhone/iPad app by LEONARDO NOVOA.)

- Source: https://appshunter.io/ios/app/ductsizer-pro/id6772545249 (this page in markdown: same URL + `.md`)
- Developer: [LEONARDO NOVOA](https://appshunter.io/developer/6772526007)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 17.6 · 5 MB
- Languages: English
- Released: 2026-05-27
- Data updated: 2026-08-07
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/ductsizer-pro/id6772545249/reviews.md

## What is DuctSizer Pro?

DuctSizer Pro is a fast HVAC duct sizing calculator built for field use.

Enter duct dimensions and friction to calculate CFM, or enter CFM and friction to find suggested duct sizes. The app supports square, round, and oval ductwork and shows key airflow values such as velocity, friction, area, and equivalent round size.

Features:
- 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 for the same airflow

DuctSizer Pro is designed as a quick reference tool for HVAC layout, estimating, and field calculations.

## Key features

- 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

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

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



## Frequently asked questions about DuctSizer Pro

### What duct shapes does DuctSizer Pro support?

DuctSizer Pro supports square, round, and oval ductwork, providing flexibility for various HVAC system designs.

### What key airflow values does DuctSizer Pro display?

The app displays crucial airflow values including velocity, friction loss, area, and the equivalent round size for the selected duct.

### Can DuctSizer Pro compare different duct sizes?

Yes, DuctSizer Pro can compare alternate duct sizes for the same airflow, helping users make informed decisions for their projects.

### Is DuctSizer Pro available on Android devices?

Currently, DuctSizer Pro is only supported on iPhone devices.

### How often is DuctSizer Pro updated?

The app was last updated on June 3, 2026, with version 1.3. This indicates a recent update and ongoing development.

### What is the age rating for DuctSizer Pro?

DuctSizer Pro has an age rating of 4+, making it suitable for a wide range of users.

### Does DuctSizer Pro have ads?

No, DuctSizer Pro does not contain advertisements.

### What is the user feedback on DuctSizer Pro?

DuctSizer Pro has received excellent user feedback, with an average rating of 5.0 stars from 2 ratings.

## Version history (last 2 releases)

### 1.3 — 2026-06-03

Added Catalog Pro with VAV and air device catalog access through a one-time in-app purchase. Improved in-app purchase setup and catalog unlock messaging.

### 1.0 — 2026-05-27

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-07.*