Best Duct alternatives: apps like Duct-Fit

9+ similar apps compared and reviewed

4.2 avg rating

8 free apps

Updated October 2026

Duct-Fit

Izumi Consulting,Inc.

🔧 Utilities

💼 Business

Duct is great, but it's not the only option. Explore 9+ similar apps for iPhone and iPad, each reviewed and rated by real users. Find free alternatives, premium upgrades, and hidden gems.

Top Alternatives to Duct

SPIDERPLUS for iPhone by SpiderPlus & Co.

Editor's Choice

🔧 Utilities

0.0(0 ratings)

Free

CalcTri V1 by TOGUCHI, CO., LTD.

Strong Contender

🔧 Utilities

0.0(0 ratings)

FreeAds

This utility app offers a calculator, right triangle calculations, and pipe centering. It mimics desktop calculator operation and allows copying from history. Supports angle input in degrees and minutes for precise calculations.

ダクトサイズ計算Pro by takesi shutou

空調ダクトのサイズ計算補助

Worth Considering

🔧 Utilities

0.0(0 ratings)

FreeAds

More apps like Duct

by Hideyuki Miyanishi

Free

View and edit CAD data files on your iPhone or iPad. Measure distances, calculate areas, and add annotations like shapes and photos. Export to PDF and print via AirPrint.

View JW_CAD/Jw_win data filesMeasure distances and calculate areasEdit annotation data

🔧 Utilities

(0)

free with in-app purchases

Compare with Duct

UnitConverter byNSDev

by NIHON SYSTEM DEVELOPER CORPORATION

Free

This tool converts between 26 different types of units, displaying conversion rates and allowing you to specify decimal places. It supports a vast array of units across categories like length, mass, volume, and more.

Converts 26 types of unitsDisplays conversion ratesCustomizable decimal places

Duct Calculator Elite

HVAC Ductulator & Duct Sizing

$9.99

This app simplifies HVAC duct sizing calculations. It computes duct size, velocity, pressure drop, and flow rate with an intuitive interface. Supports various units and duct materials for precise HVAC design.

Calculate duct size, velocity, pressure drop, flow rateDuct Size by Airflow modeDuct Size by Dimension mode

Surface Area Calculator + Cost

3D Geometric: Cube, prism

Free

Calculate the surface area of various 3D geometric shapes and get an estimated cost for materials. Supports multiple units for calculations and results.

Surface area calculation for 11 shapesMaterial cost estimationMultiple unit support

🔧 Utilities

(24)

free with in-app purchases

Compare with Duct