249+ iOS apps curated and reviewed
Looking for free ref tools apps? 20 of our 249+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.9★ (52) | No | No | Sep 2026 | |
| 2 |  | Free | 3.7★ (3) | No | No | May 2026 | |
| 3 |  | Free | 4.8★ (17K) | No | No | Sep 2026 | |
| 4 |  | Free | 2.8★ (18) | No | No | May 2026 | |
| 5 |  | Free | — | No | No | Jul 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | 4.8★ (225K) | No | No | Sep 2026 | |
| 8 |  | Free | — | No | No | May 2026 |
This app provides HVACR technicians with essential tools and information for field service. It includes refrigerant calculators, troubleshooting guides, product finders, and access to spare parts. Listen to educational podcasts to enhance your knowledge on the go.
This app helps HVACR technicians diagnose and resolve system issues. It guides users through common symptoms, identifies potential causes, and recommends solutions. An offline database is available for use in remote locations.
This app provides an instant mobile refrigerant charge calculator for HVACR applications. It supports various refrigerants and allows users to calculate the correct system charge based on superheat, subcooling, or airflow, along with environmental conditions.
