250+ iOS apps curated and reviewed
Out of 250+ air ducts executive apps on iOS, 20 are free and the rest sit in the paid tier. This page sorts them so you can compare both sides before you commit.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | — | — | No | Jul 2026 | |
| 2 |  | Free | — | No | No | Aug 2026 | |
| 3 |  | Free | 5.0★ (2) | No | No | May 2026 | |
| 4 |  | Free | — | No | No | Jun 2026 | |
| 5 |  | Free | 4.8★ (39K) | — | No | Sep 2026 | |
| 6 |  | Free | 4.9★ (587) | No | No | Sep 2026 | |
| 7 |  | Free | 4.5★ (4.7K) | No | No | Sep 2026 | |
| 8 |  | Free | 4.2★ (185) | No | No | Aug 2026 |
This mobile study guide helps users review industry acronyms, key terms, and core HVAC cleaning concepts. It offers Q&A style quizzes to test knowledge and allows for self-paced learning anytime, anywhere, supporting certification pursuits and skill sharpening.
