250+ iOS apps curated and reviewed
If you already know HVAC Load Calculator Manual J, this is the deeper bench. 250+ hvac load calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (37) | No | Yes | Sep 2026 | |
| 2 |  | Free | — | No | Yes | Sep 2026 | |
| 3 |  | Free | 4.0★ (1) | No | Yes | Jun 2026 | |
| 4 |  | Free | 5.0★ (1) | No | Yes | Sep 2026 | |
| 5 |  | Free | — | No | Yes | May 2026 | |
| 6 |  | $34.99 | 3.0★ (3) | No | Yes | Jul 2026 | |
| 7 |  | Free | — | No | Yes | Sep 2026 | |
| 8 |  | Free | 3.4★ (5) | No | Yes | Sep 2026 |
This app provides professional HVAC load calculations for contractors, offering three levels of accuracy from quick estimates to detailed Manual J calculations. It's designed for field use with an intuitive interface, offline capabilities, and professional report generation.
This tool provides fast, accurate HVAC load calculations for residential systems. It helps professionals size furnaces, air conditioners, and gas equipment correctly, avoiding guesswork and spreadsheets for confident client recommendations and more closed bids.
