249+ iOS apps curated and reviewed
If you already know HVAC Load Calculator Manual J, this is the deeper bench. 249+ hvac load calculator apps for iPhone, all reviewed and ranked by user rating, recency, and download trend as of October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (43) | No | Yes | Oct 2026 | |
| 2 |  | Free | 4.0★ (1) | No | Yes | Jun 2026 | |
| 3 |  | Free | 5.0★ (1) | No | Yes | Oct 2026 | |
| 4 |  | Free | 5.0★ (1) | No | Yes | Oct 2026 | |
| 5 |  | Free | — | No | Yes | May 2026 | |
| 6 |  | Free | 4.8★ (20) | No | Yes | Oct 2026 | |
| 7 |  | Free | 5.0★ (1) | No | Yes | Oct 2026 | |
| 8 |  | $24.99 | 2.8★ (5) | No | Yes | Oct 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.
Estimate a home's heating and cooling loads with a simplified block calculation. Input house details like area, insulation, and windows to see load breakdowns and check equipment against your quotes. Save, sync, and share detailed reports via PDF.
