205+ iOS apps curated and reviewed
The best petroleum dictionary terms definitions apps on iPhone average 4.6★ across 205+ titles — we've ranked them by what real users actually keep on their phones. Updated June 2026.
| # | App | Price | Rating | Ads | In-App Purchases | Updated | |
|---|---|---|---|---|---|---|---|
| 1 |  | Free | 3.6★ (5) | No | No | May 2026 | |
| 2 |  | Free | 4.4★ (9) | Yes | Yes | May 2026 | |
| 3 |  | Free | 4.8★ (328K) | Yes | No | Sep 2026 | |
| 4 |  | Free | 4.8★ (324K) | Yes | Yes | Sep 2026 | |
| 5 |  | Free | 4.8★ (15K) | Yes | Yes | Sep 2026 | |
| 6 |  | Free | 4.6★ (29K) | No | Yes | Sep 2026 | |
| 7 |  | $9.99 | 4.8★ (22K) | No | No | Sep 2026 | |
| 8 |  | Free | 4.6★ (12K) | Yes | Yes | Sep 2026 |
Instantly decode petroleum terms with this free offline dictionary. Perfect for students and professionals, it offers a vast encyclopedia of jargon with search, bookmarking, and audio pronunciation features.
This app provides a comprehensive offline dictionary for petroleum engineering terms, including definitions, equations, formulas, and quizzes. It offers features like speech-to-text, text-to-speech, and the ability to save favorites and view search history. It's designed for students and professionals in the oil and gas industry.
Access over 2 million trusted definitions and synonyms for English words. Enhance your vocabulary with daily new words, example sentences, and audio pronunciations. This app provides grammar tips and editorial content to deepen your understanding of the English language.
