250+ iOS apps curated and reviewed
The best smart service tool apps on iPhone average 3.5★ across 250+ titles — we've ranked them by what real users actually keep on their phones. Updated October 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 4.0★ (15) | No | No | Sep 2026 | |
| 2 |  | Free | 2.8★ (6) | No | No | Aug 2026 | |
| 3 |  | Free | — | No | No | May 2026 | |
| 4 |  | Free | 4.8★ (484K) | No | No | Oct 2026 | |
| 5 |  | Free | 3.9★ (7) | No | No | Aug 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | — | No | No | Jun 2026 | |
| 8 |  | Free | — | No | No | Oct 2026 |
This tool helps HVACR technicians quickly convert pressure to temperature and calculate superheat/subcooling using refrigerant data. It offers selectable units, customizable displays, and the ability to record and email data.
This tool helps HVACR technicians quickly calculate superheat and subcooling using embedded refrigerant data and Bluetooth sensors. It allows for data recording, custom PDF report generation, and sharing of findings.
