247+ iOS apps curated and reviewed
P is the household name in pressure temperature chart, but it's far from the only option. We track 247+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.8★ (52) | No | No | Aug 2026 | |
| 2 |  | Free | 4.8★ (17K) | No | No | Oct 2026 | |
| 3 |  | Free | 3.9★ (52) | No | No | Sep 2026 | |
| 4 |  | Free | 2.1★ (18) | No | No | May 2026 | |
| 5 |  | Free | 4.0★ (8) | No | Yes | Aug 2026 | |
| 6 |  | Free | 3.3★ (7) | No | No | Oct 2026 | |
| 7 |  | Free | 3.7★ (3) | No | No | May 2026 | |
| 8 |  | $1.99 | — | No | No | May 2026 |
This tool simplifies HVAC/R technician tasks by calculating pressure/temperature relationships, superheat, and subcool. It automatically adjusts for altitude and offers English/Metric units. Easily access favorite refrigerants and supplementary information.
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.
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.
