249+ iOS apps curated and reviewed
Duct Calculator is the household name in hvac duct size calculator, but it's far from the only option. We track 249+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated |
|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (7) | No | Yes | Aug 2026 |
| 2 |  | Free | 5.0★ (1) | No | No | May 2026 |
| 3 |  | Free | — | No | Yes | Aug 2026 |
| 4 |  | $0.99 | — | No | Yes | Aug 2026 |
| 5 |  | Free | — | No | Yes | Aug 2026 |
| 6 |  | Free | 4.6★ (11) | Yes | No | Jul 2026 |
| 7 |  | Free | — | No | Yes | Jun 2026 |
| 8 |  | $3.99 | 4.7★ (317) | No | No | Aug 2026 |
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.
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.
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.
Instantly calculate HVAC duct sizes based on airflow, friction rate, or velocity. This tool provides accurate duct dimensions in seconds without needing charts, supporting various duct types and units.
Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.
This utility app helps HVAC engineers quickly calculate the recommended Thermaflex duct size for installations. Input project volume and friction loss to determine the optimal duct size based on established industry standards.
This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.
This utility app assists HVAC design professionals in calculating duct sizes. It goes beyond basic calculations to provide a list of suitable duct sizes based on design criteria, offering an intuitive interface for precise adjustments.
This app offers a comprehensive suite of tools for HVAC technicians. It provides interactive guides, step-by-step repair instructions, and calculators for various HVAC calculations including superheat, subcooling, and duct sizing.
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.
