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 | Jul 2026 |
| 4 |  | Free | 4.8★ (323K) | Yes | Yes | Jul 2026 |
| 5 |  | Free | 4.8★ (14K) | Yes | Yes | Jul 2026 |
| 6 |  | Free | 4.6★ (28K) | No | Yes | Jul 2026 |
| 7 |  | $9.99 | 4.8★ (22K) | Yes | No | Jul 2026 |
| 8 |  | Free | 4.6★ (11K) | Yes | Yes | Jul 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.
Access America's most respected dictionary, updated with new words and meanings. This app offers offline access, voice search, daily vocabulary challenges, and a thesaurus. It's designed for English language reference, education, and vocabulary enhancement.
Access a comprehensive dictionary, thesaurus, and translation tool with millions of definitions and synonyms. Explore specialty dictionaries, learn new words daily, and play word games. This app offers offline access and integrates seamlessly with other applications.
Access a vast collection of dictionaries and thesauruses with definitions, pronunciations, and etymology. Features include offline access, advanced search options, and personalized word lists. Ideal for students, professionals, and word enthusiasts.
Access America's leading dictionary with over 15,000 extra entries for people and places. Enjoy offline access, voice search, and daily vocabulary builders. This app offers expert word guidance with a thesaurus and example sentences.
This app provides an offline dictionary and translator for over 50 languages. It offers smart word suggestions, text translation in other apps, offline pronunciation, and a picture dictionary. An optional premium upgrade unlocks advanced features and an ad-free experience.
Access a vast collection of user-submitted definitions for slang and non-slang words. Search, vote on definitions, and discover new words with daily updates. Share interesting terms easily with friends.
This app provides a comprehensive offline English dictionary and thesaurus with fast searching, spelling suggestions, definitions, and usage examples. It offers extensive word data and advanced search filters without requiring an internet connection.
Explore the origins and history of English words with this comprehensive dictionary app. It offers instant search, related word suggestions, and an offline mode for premium users. Enhance your vocabulary and understanding of word roots.
This app serves as a comprehensive offline Vietnamese-English dictionary and translator. It offers text translation, word suggestions, pronunciation guides, and a picture dictionary to enhance language learning and communication.
This comprehensive English dictionary and thesaurus offers precise definitions, synonyms, antonyms, and related words. It features intelligent search tools, offline audio, and customizable themes to enhance your language learning experience.
This app serves as a comprehensive English to Kurdish and Kurdish to English dictionary and translator. It offers offline functionality, pronunciation, definitions, and the ability to translate words directly within other applications. Users can also find related words, phrases, and even use image search for a richer learning experience.
This comprehensive English dictionary and thesaurus offers offline access to millions of words, definitions, pronunciations, and etymologies. Explore word connections, sample sentences, and discover new vocabulary with advanced search and unique features.
Instantly look up words from your iOS Home Screen without opening the app. Get definitions in seconds to aid studying, reading, or satisfying curiosity, keeping you focused and learning.
This offline dictionary and translator app facilitates Persian-English language learning and communication. It offers fast, convenient translations, smart word suggestions, and text pronunciation without an internet connection. Advanced features like a picture dictionary and cross-device sync are available with a premium upgrade.
This app offers a comprehensive offline Persian-English and English-Persian dictionary with audio pronunciation and vocabulary games. It includes thousands of words, phrases, and examples, with an optional online translation feature. Subscription packages are available for extended access.
Enhance your English vocabulary and grammar with a comprehensive offline dictionary. It offers extensive definitions, natural language examples, collocations, synonyms, and pronunciation guides for both British and American English.
This offline dictionary provides bidirectional translation between Arabic and English, featuring over 100,000 words. It's ideal for travelers, students, and anyone looking to learn either language, offering flashcards and a user-friendly interface.