249+ iOS apps & games curated and reviewed
Sizing US/CA is the household name in gas tight, but it's far from the only option. We track 249+ 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 | May 2026 | |
| 2 |  | Free | — | No | No | May 2026 | |
| 3 |  | Free | — | No | No | Aug 2026 | |
| 4 |  | $4.99 | — | No | No | Aug 2026 | |
| 5 |  | Free | — | No | No | May 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | — | No | No | May 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 simplifies calculating the required size of Gastite® CSST for gas installations. Input gas type, CSST length, and appliance power to instantly determine the correct size. It offers easy navigation, user-friendly design, and access to FAQs and installation guides.
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.
