Best Free Ductulator Apps

56+ iOS apps curated and reviewed

4.6 avg rating
16 free apps
Updated September 2026

With an average user rating of 4.6★, the free ductulator category is one of the App Store's strongest. Browse all 56+ apps we track, sorted so the most loved ones surface first.

Compare top Free Ductulator Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1SMACNA Duct-U-LatorSMACNA Duct-U-LatorFree5.0★ (1)NoNoMay 2026
2PT DuctulatorPT DuctulatorFreeNoNoMay 2026
3DigiductDigiductFree4.6★ (11)YesNoJul 2026
4Ductulator - Duct CalculatorDuctulator - Duct CalculatorFree4.6★ (32)NoYesSep 2026
5Duct Calculator: HVAC SizingDuct Calculator: HVAC SizingFreeNoYesSep 2026
6DuctSizer: Duct CalculatorDuctSizer: Duct CalculatorFreeNoYesAug 2026
7Quietflex DuctulatorQuietflex DuctulatorFree5.0★ (1)NoNoMay 2026
8SuperCool Slide Rule HVACSuperCool Slide Rule HVACFree4.2★ (185)NoNoAug 2026

Top Picks for Free Ductulator

Digiduct#3

Digiduct by Syska Hennessy Group

Duct-Sizing App
Worth Considering
🔧 Utilities
4.6(11 ratings)
Free
Digiduct screenshot 1
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This HVAC tool assists professionals with duct sizing calculations based on ASHRAE standards. It supports multiple duct shapes and offers intelligent features to ensure accurate and reliable designs for real-world scenarios.

More Free Ductulator apps to explore

FAQ about Free Ductulator

What are the best free ductulator apps for iPhone?
SMACNA Duct-U-Lator tops our free ductulator apps ranking as of September 2026, with a 5.0-star average from 1 App Store ratings, and it's free to download.
SMACNA Duct-U-Lator has no ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 56+ free ductulator apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
SMACNA Duct-U-Lator is a digital tool designed to help HVAC professionals quickly size rectangular, round, and oval ducts for optimal air flow in ventilation systems. It simplifies complex calculations for friction loss and air velocity.
Yes, SMACNA Duct-U-Lator supports sizing for rectangular, round, and oval duct types, offering flexibility for various design scenarios in HVAC projects.