249+ iOS apps curated and reviewed
The best gammon technical products apps on iPhone average 4.1★ across 249+ 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 |  | $9.99 | 4.0★ (8) | No | No | Jun 2026 | |
| 2 |  | $9.99 | 4.0★ (1) | No | No | Sep 2026 | |
| 3 |  | Free | 4.6★ (12) | No | No | Sep 2026 | |
| 4 |  | Free | 4.6★ (11) | No | No | May 2026 | |
| 5 |  | Free | 3.2★ (9) | No | No | Sep 2026 | |
| 6 |  | Free | — | No | No | May 2026 | |
| 7 |  | Free | 2.8★ (49) | No | No | Sep 2026 | |
| 8 |  | Free | 4.8★ (9.5K) | No | No | Sep 2026 |
Calculate corrected API gravity for jet, gasoline, and diesel fuels at 60°F. This digital tool also determines the total weight of the fuel, replicating the functionality of physical slide calculators.
This application calculates the corrected API gravity at 60°F for jet, gasoline, and diesel fuels. It also determines the total weight of the fuel. It's a digital replacement for physical slide calculators.
This app helps pilots find discounted jet fuel prices at preferred locations. It offers route planning to identify cost-effective fuel stops and provides detailed information on FBO services and amenities. It supports both recreational and commercial aviation for economical flight planning.
