# DuctPro: Duct Size Calculator — Duct Sizer & Static Pressure

> Duct Sizer & Static Pressure (iPhone/iPad app by Marko Petro Hankevych.)

- Source: https://appshunter.io/ios/app/ductpro-duct-size-calculator/id6790157130 (this page in markdown: same URL + `.md`)
- Developer: [Marko Petro Hankevych](https://appshunter.io/developer/6783891630)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-07-20
- Data updated: 2026-07-23
- User reviews in markdown: https://appshunter.io/ios/app/ductpro-duct-size-calculator/id6790157130/reviews.md

## What is DuctPro?

Replaces your duct wheel — and does what it never could.
DuctPro sizes ductwork the way you actually work: type the CFM, set your friction rate or velocity limit, and get the size instantly. Round, rectangular, flex (with compression correction), and flat-oval. Then do what no wheel can: build the whole job, watch external static pressure add up run by run, and export a clean duct schedule PDF for the file or the customer.

BUILT FOR THE FIELD
• Instant sizing by friction rate or velocity — results update as you type
• Round, rectangular (lock a side), flex with compression %, and flat-oval
• Reverse mode: pick a size, see what it carries
• Per-job static pressure tally with a fitting equivalent-length library
• Client-ready PDF duct schedule with your company name
• Velocity warnings when a run gets loud
• Imperial and metric. Works offline. No account.

HONEST ENGINEERING
Darcy–Weisbach and Colebrook–White, computed — not looked up. The methodology page shows every formula and assumption. No ASHRAE tables are reproduced.

SIMPLE PRICE
Round-duct sizing is free forever. One $9.99 purchase unlocks every duct type, reverse mode, jobs, and PDF schedules. That's it — no subscription, versus $33 for the plastic wheel in your truck.

Terms: https://web-chi-rosy-ve6dvxhliy.vercel.app/ductpro/terms · Privacy: https://web-chi-rosy-ve6dvxhliy.vercel.app/ductpro/privacy

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| DuctPro Pro | $9.99 | one-time |



## Version history (last 1 release)

### 1.0 — 2026-07-20

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 2026-07-23.*