Best Free Vocabulary Dictionary Apps

242+ iOS apps curated and reviewed

4.6 avg rating
19 free apps
Updated May 2026

Whether you're new to free vocabulary dictionary or looking for an upgrade, our curated collection of 242+ iOS apps has something for everyone. Each app is reviewed and rated by real users, helping you make an informed decision.

Top Picks for Free Vocabulary Dictionary

Oxford Dictionary & Thesaurus#1

Oxford Dictionary & Thesaurus by MobiSystems, Inc.

Thesaurus & Offline Vocabulary
Editor's Choice
πŸ” Reference
4.6😐(28K ratings)
FreeAdsIn-App Purchases
#79in 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

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

Room to Improve

  • πŸ› Glitchy, way too many ads
  • πŸ”’ Annoying popup ads makes it unusable
  • πŸ”’ Ads stuck in, despite payment
Dictionary.com: English Words#2

Dictionary.com: English Words by Curiosity Media, Inc.

Dictionary, Thesaurus, Vocab
Strong Contender
πŸ” 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
Dictionary.com: English Words screenshot 6

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

  • πŸš€ Robust dictionary and thesaurus
  • πŸ€“ Helpful resources like blogs and articles
  • πŸ’‘ Useful word games and puzzles
  • πŸ‘ Easy to use and navigate

Room to Improve

  • πŸ› Inconsistent search results and missing definitions
  • πŸ’Έ Aggressive ads even after paid upgrades
  • 🀯 Frequent crashes and performance issues
Merriam-Webster Dictionary#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
πŸ” Reference
4.8😊(320K ratings)
FreeAdsIn-App Purchases
#39in 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

  • πŸš€ Easy to use
  • πŸ‘ Comprehensive definitions
  • πŸ‘ Helpful thesaurus
  • πŸš€ Offline access

Room to Improve

  • πŸ› Ads can be intrusive
  • πŸ› Difficulty closing ads
  • πŸ› Repetitive game questions

More Free Vocabulary Dictionary apps to explore

4
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Erweitern Sie Ihren Wortschatz
Free

Expand your vocabulary with daily word learning and engaging games. This app offers customizable learning paths and difficulty levels to suit your English proficiency. Make vocabulary acquisition a fun and effective part of your routine.

Learn new words dailyCustomizable difficulty levelsSelect vocabulary categories
πŸ“š Education
(205K)
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
πŸ“š Education
(11K)
free with in-app purchases
6
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
πŸ” Reference
(4.3K)
free with in-app purchases
7
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Vocab Builder & Word Games
Free

Enhance your vocabulary with daily words, engaging games, and personalized quizzes. This app offers expert-curated content and interactive challenges to make learning stick and improve your communication skills.

Daily word insights with definitions and examplesVocabulary assessment and personalized learning plansWord games like Hangman and Gaps
πŸ“š Education
(38K)
free with in-app purchases
8
English Dictionary *
English Dictionary *
English Dictionary *
Thesaurus and Vocabulary words
Free

Enhance your English vocabulary with a comprehensive offline dictionary and thesaurus. Access over 500,000 words, their meanings, synonyms, antonyms, and pronunciations. Perfect for students and professionals to improve language skills anytime, anywhere.

Offline word searchSynonyms and antonymsWord definitions
πŸ” Reference
(1.1K)
subscription
9
LookUp: English Dictionary App
LookUp: English Dictionary App
LookUp: English Dictionary App
Build vocabulary, a word daily
Free

Enhance your English vocabulary with a daily word, interactive quizzes, and a comprehensive dictionary. Features include visual learning aids, audio pronunciations, and translations to over 20 languages. Ideal for learners and word enthusiasts.

Daily Word of the Day with illustrationsComprehensive English Dictionary & ThesaurusAudio pronunciations and example sentences
πŸ” Reference
(3.1K)
free with in-app purchases
10
SpanishDictionary.com Learning
SpanishDictionary.com Learning
SpanishDictionary.com Learning
Translator, Conjugation & More
Free

Master Spanish with this comprehensive app. It offers translation, verb conjugation, interactive lessons, pronunciation videos, and vocabulary practice. Learn online or offline with millions of trusted users.

Spanish-English DictionarySpanish-English TranslatorSpanish Verb Conjugations
πŸ“š Education
(197K)
free with in-app purchases
11
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
πŸ” Reference
(22K)
freemium
12
English Dictionary : Offline
English Dictionary : Offline
English Dictionary : Offline
English to English Vocabulary
Free

Access a comprehensive English to English dictionary with over 150,000 words and their meanings, all available offline. Test your vocabulary with interactive quizzes and save favorite words. Features include speech-to-text, text-to-speech, and word sharing.

Offline English to English dictionary150,000+ words and meaningsVocabulary quizzes
πŸ“š Education
(572)
free with in-app purchases
13
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Synonyms power up vocabulary
Free

Enhance your writing by accessing a thesaurus directly from your keyboard. Select any word in any app to instantly see synonyms and related terms, helping you expand your vocabulary and refine your text. This ad-free tool offers a simple and effective way to improve your communication.

Keyboard thesaurus integrationInstant word suggestionsSynonym lookup in any app
πŸ” Reference
(258)
free with in-app purchases
14
Vocabulary.com
Vocabulary.com
Vocabulary.com
by Curiosity Media, Inc.
Free

Master new words with an engaging, game-like system powered by a smart dictionary. Personalized learning adapts to your level, offering quizzes and reinforcement to improve your communication skills for school and business.

Adaptive learning algorithmsPersonalized word learningGame-like learning experience
πŸ“š Education
(4.9K)
free
15
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
πŸ” Reference
(11K)
free with in-app purchases
16
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
πŸ” Reference
(85)
free
17
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
by Weeswares Pte Ltd
Free

This is a straightforward thesaurus app that provides synonyms and antonyms for words. It focuses on simplicity and ease of use, offering related words alongside definitions. An internet connection is required for it to function.

Synonyms and antonymsRelated wordsSimple interface
πŸ” Reference
(120)
free
18
English Dictionary: LMDict
English Dictionary: LMDict
English Dictionary: LMDict
Dictionary English Offline
Free

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.

Offline English dictionaryIntegrated grammar and thesaurusCollocations dictionary
πŸ“š Education
(875)
free with in-app purchases
19
Dictionary
Dictionary
Dictionary
in Widget
Free

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.

Home Screen widget for instant lookupsNo app launch requiredQuick definitions
πŸ” Reference
(4)
ad-supported
20
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
πŸ” Reference
(14K)
free with in-app purchases