250+ iOS apps curated and reviewed
Sizing US/CA is the household name in gas tight, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.2★ (13) | Yes | No | Oct 2026 | |
| 2 |  | $4.99 | — | No | No | Aug 2026 | |
| 3 |  | Free | — | No | No | Oct 2026 | |
| 4 |  | Free | — | No | No | May 2026 | |
| 5 |  | Free | — | No | No | Aug 2026 | |
| 6 |  | Free | 4.1★ (71) | Yes | No | Nov 2026 | |
| 7 |  | Free | — | No | Yes | Nov 2026 | |
| 8 |  | Free | — | No | No | May 2026 |
This utility app helps installers determine the correct size of flexible gas piping for their projects. It calculates the appropriate pipe size based on gas type, tubing length, supply pressure, and flow capacity. Users can also access installation guides and product information.
This app provides step-by-step guides and timers for conducting tightness tests on Natural Gas and LPG systems. It supports various domestic and medium operating systems for NG, and propane, butane, and domestic systems for LPG. An alarm signals the completion of timed tests.
This app guides users through natural gas tightness testing procedures step-by-step. It includes timed tests with alarms and a visual manometer to display pressures. It also offers explanations of standing and working pressures for a comprehensive understanding.
