248+ iOS apps curated and reviewed
The best quietflex ductulator apps on iPhone average 4.4★ across 248+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 2 |  | Free | 4.6★ (32) | No | Yes | Sep 2026 | |
| 3 |  | Free | — | No | Yes | Sep 2026 | |
| 4 |  | Free | 1.9★ (20) | No | Yes | May 2026 | |
| 5 |  | Free | — | No | Yes | Aug 2026 | |
| 6 |  | $3.99 | 4.7★ (317) | No | No | Sep 2026 | |
| 7 |  | Free | — | No | No | May 2026 | |
| 8 |  | Free | — | No | Yes | Aug 2026 |
This utility app helps HVAC professionals and enthusiasts quickly calculate essential airflow metrics for various duct sizes. It provides CFM, FPM, and FL values, simplifying HVAC system design and analysis.
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.
