248+ iOS apps curated and reviewed
With an average user rating of 3.2★, the ashrae hvac duct sizer category is one of the App Store's strongest. Browse all 248+ apps we track, sorted so the most loved ones surface first.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | $5.99 | — | No | No | Sep 2026 | |
| 2 |  | $0.99 | — | No | Yes | Aug 2026 | |
| 3 |  | Free | — | No | Yes | Oct 2026 | |
| 4 |  | Free | 5.0★ (1) | No | No | May 2026 | |
| 5 |  | $4.99 | 3.1★ (9) | No | Yes | Oct 2026 | |
| 6 |  | $3.99 | — | No | No | Oct 2026 | |
| 7 |  | Free | 1.0★ (2) | No | No | Oct 2026 | |
| 8 |  | Free | 4.2★ (195) | No | No | Oct 2026 |
Calculate HVAC duct sizes using the constant friction method. Input airflow or dimensions to determine duct sizes, velocity, and friction loss. Supports rectangular, round, and oval ducts with adjustable air temperature and pressure.
