About this app
This duct sizing app was created for HVAC design professionals who might normally use a "ductulator" to select an duct sizes. The app goes beyond simply calculating velocity, friction, or volume; It also offers a list of every even sized duct that meet the design criteria for the user to review and consideration at various aspect ratios. The app features a highly intuitive interface which allows the user to easily adjust values with precision (without the use of cumbersome "slider" controls), or alternatively to enter the values directly with a keypad interface. Feel free to email comments and suggestions to ductapp@elecpe.com
Latest release
What’s New
This app has been updated by Apple to prepare for watchOS 27 compatibility. No new features are included. updated for 64 bit compatibility
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Sep 1, 2026 · 5:04 AM $0.99
Screenshots
