It doesn't have enough ratings yet to judge what users think.
DuctPro: Duct Size Calculator is made and published by
Marko Petro Hankevych.
AppBrain is an independent app data site and isn't affiliated with Marko Petro Hankevych.
The app name, icon, screenshots and description belong to Marko Petro Hankevych and are shown as
published on the App Store.
About DuctPro: Duct Size Calculator
DuctPro: Duct Size Calculator is an utilities app developed by Marko Petro Hankevych.
User Ratings
DuctPro: Duct Size Calculator is rated 5.00 out of 5 stars. The rating is based on one rating ratings.
App Information
DuctPro: Duct Size Calculator is freely available from the App Store. The app size is 1.29 MB. The latest version available is 1.0. The last update was on July 20, 2026.
Technical Requirements
The app has a content rating of Everyone. The app has been available on the App Store since July 2026.
Description by Marko Petro Hankevych(from the App Store)
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.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
