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Best Earth Science Dictionary Offline Apps

0+ iOS apps curated and reviewed

4.7 avg rating
17 free apps
Updated July 2026

With an average user rating of 4.7★, the earth science dictionary offline category is one of the App Store's strongest. Browse all 0+ apps we track, sorted so the most loved ones surface first.

Compare top Earth Science Dictionary Offline Apps (July 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoAug 2026
2Oxford Dictionary & ThesaurusOxford Dictionary & ThesaurusFree4.6★ (29K)NoYesAug 2026
3Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (324K)YesYesAug 2026
4Dictionary Offline - Dict BoxDictionary Offline - Dict BoxFree4.6★ (12K)YesYesAug 2026
5Etymonline English DictionaryEtymonline English DictionaryFree4.9★ (11K)YesYesAug 2026
6Dictionary.Dictionary.Free4.8★ (15K)YesYesAug 2026
7WordWeb DictionaryWordWeb DictionaryFree4.6★ (268)NoNoAug 2026
8Thai Dictionary - Dict BoxThai Dictionary - Dict BoxFree4.8★ (3.5K)YesYesAug 2026

Top Picks for Earth Science Dictionary Offline

Dictionary.com: English Words#1

Dictionary.com: English Words by Curiosity Media

Dictionary, Thesaurus, Vocab
Editor's Choice
🔍 Reference
4.8😐(328K ratings)
FreeAdsIn-App Purchases
Dictionary.com: English Words screenshot 1
Dictionary.com: English Words screenshot 2
Dictionary.com: English Words screenshot 3
Dictionary.com: English Words screenshot 4
Dictionary.com: English Words screenshot 5

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.

What We Love

  • 🚀 Robust dictionary and thesaurus
  • 🤓 Helpful resources like blogs and articles
  • 💡 Useful word games and puzzles
  • 👍 Easy to use and navigate

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues
Oxford Dictionary & Thesaurus#2

Oxford Dictionary & Thesaurus by MobiSystems, Inc.

Etymology & Offline Vocabulary
Strong Contender
🔍 Reference
4.6😐(29K ratings)
FreeIn-App Purchases
#84in Reference
Oxford Dictionary & Thesaurus screenshot 1
Oxford Dictionary & Thesaurus screenshot 2
Oxford Dictionary & Thesaurus screenshot 3
Oxford Dictionary & Thesaurus screenshot 4
Oxford Dictionary & Thesaurus screenshot 5
Oxford Dictionary & Thesaurus screenshot 6

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.

What We Love

  • 👍 Reliable and simple to use
  • 👍 Comprehensive and best for all English, especially rare and aged language
  • 👍 Very useful for learning new words
  • 👍 Excellent reference app

Room to Improve

  • 🐛 Glitchy, way too many ads
  • 🔒 Annoying popup ads makes it unusable
  • 🔒 Ads stuck in, despite payment
Merriam-Webster Dictionary#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
🔍 Reference
4.8😊(324K ratings)
FreeAdsIn-App Purchases
#41in Reference
Merriam-Webster Dictionary screenshot 1
Merriam-Webster Dictionary screenshot 2
Merriam-Webster Dictionary screenshot 3
Merriam-Webster Dictionary screenshot 4

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.

What We Love

  • 🚀 Easy to use
  • 👍 Comprehensive definitions
  • 👍 Helpful thesaurus
  • 🚀 Offline access

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions

More Earth Science Dictionary Offline apps to explore

4
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary for All Languages
Free

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.

Offline dictionary & translator50+ languages supportedSmart word suggestions
🔍 Reference
(12K)
free with in-app purchases
5
Etymonline English Dictionary
Etymonline English Dictionary
Etymonline English Dictionary
Dictionary to Build Vocabulary
Free

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.

Word origin explorationInstant search with suggestionsRelated words by root
📚 Education
(11K)
free with in-app purchases
6
Dictionary.
Dictionary.
Dictionary.
by TheFreeDictionary.com
Free

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.

Offline dictionary and thesaurusMillions of definitions and synonymsWord of the Day and Idiom of the Day
🔍 Reference
(15K)
free with in-app purchases
7
WordWeb Dictionary
WordWeb Dictionary
WordWeb Dictionary
Offline ad-free dictionary
Free

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.

Offline dictionary and thesaurusFast searchingSpelling suggestions
🔍 Reference
(268)
free
8
Thai Dictionary - Dict Box
Thai Dictionary - Dict Box
Thai Dictionary - Dict Box
Thai Translator - Translate
Free

This app provides offline English-Thai and Thai-English translation with definitions, synonyms, and pronunciations. It offers smart word suggestions, a picture dictionary, and word reminders, all accessible without an internet connection. An optional premium upgrade unlocks advanced features and an ad-free experience.

Offline English-Thai translationOffline Thai-English translationDefinitions, synonyms, pronunciations
🔍 Reference
(3.5K)
free with in-app purchases
9
Vietnamese Dictionary Dict Box
Vietnamese Dictionary Dict Box
Vietnamese Dictionary Dict Box
Engish Vietnamese Translator
Free

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.

Offline dictionary and translatorText translation for sentences and paragraphsIntelligent word suggestions
🔍 Reference
(18K)
free with in-app purchases
10
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Premium Ad-free Dictionary
$9.99

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.

Ad-free experience15,000+ premium entriesOffline dictionary access
🔍 Reference
(22K)
freemium
11
Kurdish Dictionary - Dict Box
Kurdish Dictionary - Dict Box
Kurdish Dictionary - Dict Box
English Kurdish Translation
Free

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.

Offline translation and pronunciationExtensive word and expression databaseIn-app word translation
🔍 Reference
(14K)
free with in-app purchases
12
Dictionary and Thesaurus Pro
Dictionary and Thesaurus Pro
Dictionary and Thesaurus Pro
by TheFreeDictionary.com
$9.99

Access a comprehensive offline dictionary and thesaurus with extensive content in multiple languages. Explore definitions, synonyms, and specialized dictionaries for various fields. Enjoy an ad-free experience with features like word games and instant lookups.

Ad-free experienceOffline English dictionary and thesaurusOffline dictionaries in 13 languages
🔍 Reference
(2.6K)
paid
13
English Dictionary - Offline
English Dictionary - Offline
English Dictionary - Offline
Offline English Dictionary
Free

A comprehensive offline English dictionary offering in-depth word definitions, usage examples, and rich language data. Explore synonyms, antonyms, pronunciations, and more without an internet connection.

Offline accessDetailed word definitionsUsage examples
🔍 Reference
(7)
free with in-app purchases
14
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
Free

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.

140,000+ definitionsSynonyms, antonyms, and related wordsOffline audio pronunciation
🔍 Reference
(4.6K)
free with in-app purchases
15
Advanced English Dictionary.
Advanced English Dictionary.
Advanced English Dictionary.
English Dictionary & Thesaurus
$2.99

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.

Extensive word database (4.9 million words)High-quality audio pronunciations (US, UK, AU)Advanced search technology
🔍 Reference
(241)
paid
16
Avenza Maps: Offline Mapping
Avenza Maps: Offline Mapping
Avenza Maps: Offline Mapping
GPS Navigation & Trail Maps
Free

Navigate any terrain with offline GPS maps, even without cell service. Explore a vast Map Store for hiking, biking, and travel, or import your own custom maps. Record tracks, add notes, and identify your location precisely.

Offline GPS navigationReal-time GPS position and directionRecord GPS tracks
🗺️ Navigation
(127K)
free with in-app purchases
17
Korean Dictionary - Dict Box
Korean Dictionary - Dict Box
Korean Dictionary - Dict Box
Translate - Korean Translator
Free

This app provides offline English to Korean and Korean to English translation with smart word suggestions and text pronunciation. It also offers features like a picture dictionary and word reminders, with an optional premium upgrade for advanced functionalities.

Offline English to Korean translationOffline Korean to English translationSmart word suggestions
🔍 Reference
(5.7K)
free with in-app purchases
18
Bilingual Malayalam Dictionary
Bilingual Malayalam Dictionary
Bilingual Malayalam Dictionary
Fast, offline and bilingual
Free

This app provides a comprehensive offline English to Malayalam dictionary with over 200,000 words. It includes meanings, sample sentences, proverbs, antonyms, and synonyms, making it a valuable tool for language learners and speakers.

Offline English-Malayalam dictionary200,000+ wordsAntonyms and Synonyms
📚 Education
(23)
free
19
Persian Dictionary - ديكشنري
Persian Dictionary - ديكشنري
Persian Dictionary - ديكشنري
ديكشنري و مترجم فارسي انگلیسي
Free

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.

Offline Persian-English dictionaryOffline English-Persian dictionaryNative audio pronunciation
🔍 Reference
(10K)
free with in-app purchases
20
Persian Dictionary - Dict Box
Persian Dictionary - Dict Box
Persian Dictionary - Dict Box
دیکشنری انگلیسی به فارسی
Free

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.

Offline English to Farsi translationOffline Farsi to English translationSmart word suggestions
🔍 Reference
(86K)
free with in-app purchases

FAQ about Earth Science Dictionary Offline

What are the best earth science dictionary offline apps for iPhone?
Dictionary.com: English Words tops our earth science dictionary offline apps ranking as of July 2026, with a 4.8-star average from 328K App Store ratings, and it's free to download.
Yes — 17 of the top earth science dictionary offline apps we rank are free to download, including Dictionary.com: English Words and Oxford Dictionary & Thesaurus.
Dictionary.com: English Words shows ads and has no in-app purchases, according to its App Store listing as of July 2026.
This app serves as a comprehensive English dictionary and thesaurus, offering over 2 million trusted definitions and synonyms. It aims to help users improve their English vocabulary, understanding, and writing skills through various features.
Key features include access to millions of definitions and synonyms, a 'Word of the Day' to expand vocabulary, example sentences to show word usage, audio pronunciations, grammar tips, and a search history to track learned words.