Best apps like SMART Union

2+ similar apps compared and reviewed

4.1 avg rating

2 free apps

Updated October 2026

SMART Union

International Association of Sheet Metal, Air, Rail and Transportation Workers

💼 Business

🔍 Reference

Whether you want more options like SMART Union or a completely different take on the same concept, our curated list of 2+ similar apps has you covered. Updated for 2026 with the latest ratings and comparisons.

Top Alternatives to SMART Union

SMACNA Duct-U-Lator by SHEET METAL CONTRACTORS NATIONAL ASSOCIATION, INC.

Size Simple HVAC Duct Runs

Editor's Choice

💼 Business

5.0(1 ratings)

Free

This tool simplifies HVAC duct sizing for professionals. It quickly calculates dimensions for rectangular, round, and oval ducts based on airflow, friction loss, and velocity, ensuring optimal ventilation system performance.

Comply365 by Comply365

Strong Contender

💼 Business

3.2(17 ratings)

Free

Access company communications, tasks, and required publications on your mobile device. Fill out forms, take courses, and complete assigned tasks efficiently, even without an internet connection.