This app offers a streamlined conversion experience for oilfield professionals. It provides over 1000 conversion types across 19 categories, all accessible on a single screen for maximum efficiency and accuracy.



240+ iOS apps curated and reviewed
The best quick conversion units apps on iPhone average 4.6★ 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 | $4.99 | 5.0★ (1) | No | No | May 2026 | ||
| 2 | Free | 3.6★ (150) | Yes | Yes | Sep 2026 | ||
| 3 | Free | 4.7★ (48K) | Yes | No | Sep 2026 | ||
| 4 | Free | 4.8★ (193K) | Yes | Yes | Sep 2026 | ||
| 5 | Free | — | No | No | May 2026 | ||
| 6 | Free | 4.8★ (81K) | Yes | Yes | Sep 2026 | ||
| 7 | Free | 4.0★ (4) | Yes | No | Sep 2026 | ||
| 8 | Free | — | No | No | Aug 2026 |



This app offers a streamlined conversion experience for oilfield professionals. It provides over 1000 conversion types across 19 categories, all accessible on a single screen for maximum efficiency and accuracy.



Easily convert between hundreds of units across 43 categories, including currency with daily updated rates. Customize your workflow by hiding or reordering units and categories.





Quickly convert between thousands of units with an intelligent search and autocomplete feature. This app offers a streamlined interface, an integrated calculator, and the ability to save favorite conversions. It supports over 6,400 units across 51 categories, making it a comprehensive tool for all your conversion needs.