Best Duct Design Apps

248+ iOS apps curated and reviewed

4.1 avg rating
18 free apps
Updated September 2026

From beginner-friendly picks to power-user tools, our duct design list covers 248+ iPhone apps updated through September 2026. Compare ratings, prices, and screenshots in one place.

Compare top Duct Design Apps (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Ductulator - Duct CalculatorDuctulator - Duct CalculatorFree4.6★ (32)NoYesSep 2026
2FieldFabFieldFabFree4.4★ (65)NoNoJul 2026
3ScanPlan: HVAC Load & DuctsScanPlan: HVAC Load & DuctsFree5.0★ (1)NoYesSep 2026
4SuperCool Slide Rule HVACSuperCool Slide Rule HVACFree4.2★ (185)NoNoAug 2026
5Duct Mate: HVAC Duct SizerDuct Mate: HVAC Duct SizerFreeNoYesJul 2026
6Duct Calculator: HVAC SizingDuct Calculator: HVAC SizingFreeNoYesSep 2026
7Triple J DuctworkTriple J DuctworkFree5.0★ (2)NoNoJul 2026
8DigiductDigiductFree4.6★ (11)YesNoJul 2026

Top Picks for Duct Design

Ductulator - Duct Calculator#1

Ductulator - Duct Calculator by Mikhail Nikitin

HVAC Airflow Sizing & Design
Editor's Choice
🔧 Utilities
4.6(32 ratings)
FreeIn-App Purchases
Ductulator - Duct Calculator screenshot 1
Ductulator - Duct Calculator screenshot 2
Ductulator - Duct Calculator screenshot 3
Ductulator - Duct Calculator screenshot 4
Ductulator - Duct Calculator screenshot 5
Ductulator - Duct Calculator screenshot 6

This app provides professional HVAC duct sizing and psychrometric calculations in a single tool. It offers detailed calculations for various duct types and materials, along with comprehensive humid air property analysis. Designed for HVAC professionals, it replaces traditional ductulators with accurate digital functionality.

FieldFab#2

FieldFab by Robert Sale

CAD for the HVAC installer
Strong Contender
🎨 Graphics & Design
4.4(65 ratings)
Free
FieldFab screenshot 1
FieldFab screenshot 2
FieldFab screenshot 3
FieldFab screenshot 4
FieldFab screenshot 5

This app helps HVAC installers create precise ductwork transitions in the field using augmented reality. It streamlines the process of measuring, designing, and visualizing complex ductwork before cutting any materials, saving time and reducing errors.

ScanPlan: HVAC Load & Ducts#3

ScanPlan: HVAC Load & Ducts by DAVID C ROSS

LiDAR floor plans & Manual J
Worth Considering
🔧 Utilities
5.0(1 ratings)
FreeIn-App Purchases
ScanPlan: HVAC Load & Ducts screenshot 1
ScanPlan: HVAC Load & Ducts screenshot 2
ScanPlan: HVAC Load & Ducts screenshot 3
ScanPlan: HVAC Load & Ducts screenshot 4
ScanPlan: HVAC Load & Ducts screenshot 5
ScanPlan: HVAC Load & Ducts screenshot 6

This app transforms your iPhone or iPad Pro into a comprehensive HVAC design toolkit. It allows for on-site room scanning with LiDAR, calculation of heating and cooling loads, duct and equipment sizing, and generation of professional PDF reports.

More Duct Design apps to explore

FAQ about Duct Design

What are the best duct design apps for iPhone?
Ductulator - Duct Calculator tops our duct design apps ranking as of September 2026, with a 4.6-star average from 32 App Store ratings, and it's free to download.
Yes — 18 of the top duct design apps we rank are free to download, including Ductulator - Duct Calculator and FieldFab.
Ductulator - Duct Calculator has no ads and offers in-app purchases, according to its App Store listing as of September 2026.
We track 248+ duct design apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
Duct Calculator is a professional tool for HVAC engineers and contractors to perform accurate duct sizing and psychrometric calculations. It helps determine optimal duct sizes, calculate pressure drops for fittings, and analyze humid air properties.
Duct Calculator can size round, rectangular, and flexible ductwork. It supports calculations for 6 different duct materials, including galvanized steel, flex duct, and duct board.