240+ iOS apps curated and reviewed
The best gb gas rate calculator apps on iPhone average 4.4★ across 240+ titles — we've ranked them by what real users actually keep on their phones. Updated September 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free was $4.99 | — | No | Yes | Sep 2026 | |
| 2 |  | Free | — | No | No | Sep 2026 | |
| 3 |  | $4.99 | — | No | No | Jul 2026 | |
| 4 |  | Free | — | No | Yes | May 2026 | |
| 5 |  | $4.99 | — | No | No | Sep 2026 | |
| 6 |  | Free | 5.0★ (6) | No | No | Jul 2026 | |
| 7 |  | Free | 4.7★ (3) | No | No | May 2026 | |
| 8 |  | Free | 4.7★ (448K) | Yes | No | Sep 2026 |
This tool simplifies calculating heat input and gas rates for natural gas installations. It offers an enhanced version with adjustable calorific values and accommodates shorter timing intervals for metric meters, providing quick and accurate results without manual chart lookups.
This app provides quick conversions for various gas measurements, including natural gas and LPG, as well as water volumes and flow rates. It also handles metric to imperial measurements and electrical unit conversions.
Calculate domestic gas rates for Imperial and Metric gas meters up to 16 cubic metres. This tool is designed for Gas Service Engineers and Installers, offering the ability to email results directly.
