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  2. STORE CARD
  3. DuctWise HVAC Duct Calculator
DuctWise HVAC Duct Calculator icon

DuctWise HVAC Duct Calculator

Yaniv van der Stigchel

You already know how to size a duct.

no ratings yetPaid #69 US▲26 / 24hLast observed chart rank per day over 14 days. Taller is better (#1 is tallest). Hollow bars mean no observation.2026-10-20 no data2026-10-21 no data2026-10-22 no data2026-10-23 no data2026-10-24 #802026-10-25 #712026-10-26 #422026-10-27 #272026-10-28 #192026-10-29 #322026-10-30 #612026-10-31 #742026-11-01 #972026-11-02 #69best rank in the 14 days#19Last 14 days · paid chart rankhollow = no data

RISINGFOUND EARLY

RANKS Paid US #69 · Store rising US #7

Screenshots and the icon are reduced copies of the developer’s assets; each opens the App Store page. Removal requests: hello@tesign.com.

AT A GLANCE

USAGE
$4.99 · in-app purchases [unconfirmed] · iOS/iPadOS
GENRE
Utilities · Productivity
CURRENT VERSION
1.2.2 ·
DEVELOPER
Yaniv van der Stigchel
APP STORE
View on the App Store ↗
CATEGORY
PRODUCTIVITY

A summary, not legal advice.

STORE DESCRIPTION

You already know how to size a duct. This agrees with your wheel, and then answers the part the wheel cannot.

Type the airflow and the friction rate. DuctWise gives you a round size the supply house actually stocks, the velocity that size will really run at, and the static the whole run will cost you — off the ASHRAE friction chart for galvanised round duct, the same chart the ductulator in your door pocket is printed from.

THE PART A WHEEL CANNOT DO

The round size was never the hard part. What fits in a 2x10 joist bay is. Tap once and you get every stocked rectangular size that carries the…

The opening of the App Store description as stored, at most 600 characters. Written by the developer; formatting is not rendered.

RATING · RATING COUNT TREND

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The last observation of each day. A sudden jump in the count can be rating inflation — read it next to the rank change.

TIMELINE

  1. Released on the App Store
  2. First observed on a chart by TESIGN
  3. Observed inside the top 20 (Paid US #19)
  4. Current version released

AI chooses the lists under the owner’s delegation. No human review is running in September 2026. Total stars, increases, cross-source signals, last updates and licences are shown as evidence. How ranks work →

If this app gets editorial text (why, build, who, start, caveat) it becomes an edited entry. Until then the page shows only Apple’s public store information and our observed numbers.

App Store is a service mark of Apple Inc. Apple and the Apple logo are trademarks of Apple Inc. · Chart and rating source: Apple (top 100 free/paid per country, observed twice a day)