Best Dictionary App

250+ iOS apps curated and reviewed

3.8 avg rating
20 free apps
Updated August 2026

With an average user rating of 3.8★, the dictionary app category is one of the App Store's strongest. Browse all 250+ apps we track, sorted so the most loved ones surface first.

Compare top Dictionary App (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (324K)YesYesAug 2026
2Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoAug 2026
3Oxford Dictionary & ThesaurusOxford Dictionary & ThesaurusFree4.6★ (29K)NoYesAug 2026
4Vocabulary - Learn words dailyVocabulary - Learn words dailyFree4.8★ (214K)YesYesAug 2026
5Dictionary.Dictionary.Free4.8★ (15K)YesYesAug 2026
6Dictionary and Translation AppDictionary and Translation AppFreeNoNoMay 2026
7Dictionary-English to EnglishDictionary-English to EnglishFreeNoNoMay 2026
8Dictionary - Word Search LexDictionary - Word Search LexFree3.0★ (1)YesNoJul 2026

Top Picks for Dictionary App

Merriam-Webster Dictionary#1

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Editor's Choice
🔍 Reference
4.8😊(324K 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

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

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions
Dictionary.com: English Words#2

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

Dictionary, Thesaurus, Vocab
Strong Contender
🔍 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#3

Oxford Dictionary & Thesaurus by MobiSystems, Inc.

Etymology & Offline Vocabulary
Worth Considering
🔍 Reference
4.6😐(29K ratings)
FreeIn-App Purchases
#80in 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

More Dictionary App apps to explore

4
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Vocabulary - Learn words daily
Word of the day widget & games
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
📚 Education
(214K)
free with in-app purchases
5
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
6
Dictionary and Translation App
Dictionary and Translation App
Dictionary and Translation App
dictionary and translation
Free
📚 Books
(0)
7
Dictionary-English to English
Dictionary-English to English
Dictionary-English to English
English to English dictionary
Free
📚 Education
(0)
8
Dictionary - Word Search Lex
Dictionary - Word Search Lex
Dictionary - Word Search Lex
Dictionary for normal Language
Free

Access a professional multilingual dictionary for English, Japanese, and Korean. Get detailed definitions, pronunciations, and example sentences. Save your search history and favorites for offline language learning.

Multilingual definitionsPronunciations and examplesAuto-save history
🔧 Utilities
(1)
ad-supported
9
Vocab Vantage: Dictionary App
Vocab Vantage: Dictionary App
Vocab Vantage: Dictionary App
by Mun Jiunn Tan
Free
📚 Education
(0)
10
English to Urdu Offline Dictionary App
English to Urdu Offline Dictionary App
English to Urdu Offline Dictionary App
by Faisal Asghar
Free
📚 Education
(0)
11
English Picture Dictionary App
English Picture Dictionary App
English Picture Dictionary App
Guess the Word from Pictures
Free

This educational game helps ESL learners and young students expand their English vocabulary through interactive quizzes. It focuses on basic and sight words, providing a fun way to test reading comprehension and build language skills.

Vocabulary improvementSight words learningInteractive quizzes
📚 Education
(1)
free
12
Cambridge English Dictionary
Cambridge English Dictionary
Cambridge English Dictionary
for Advanced Learners, 4th ed.
Free

This comprehensive dictionary app provides definitions, pronunciations, and thesaurus entries for over 140,000 words and phrases. It offers advanced search capabilities, learning tools like flashcards and quizzes, and offline access. Ideal for English learners preparing for exams.

British and American English audio pronunciationsSMART Thesaurus for related words and phrasesFlash Card Quiz for memorization
🔍 Reference
(289)
free with in-app purchases
13
WRDZ: Children's Dictionary
WRDZ: Children's Dictionary
WRDZ: Children's Dictionary
Longform dictionary for kids
Free
📚 Education
(0)
14
Portuguese Dictionary App
Portuguese Dictionary App
Portuguese Dictionary App
English Portuguese Dictionary
Free
📚 Education
(0)
15
Yoruba Dictionary App
Yoruba Dictionary App
Yoruba Dictionary App
by Philip Akoda
Free

This app serves as a comprehensive Yoruba language learning tool, offering thousands of Yoruba and English words with translations. It features audio pronunciations, daily new words, and offline access through an in-app purchase. Users can explore definitions, sentence examples, and synonyms to deepen their understanding.

Thousands of Yoruba and English wordsAudio pronunciations by native speakersWord of the Day
📚 Education
(2)
free with in-app purchases
16
Synonyms & Antonyms Dictionary
Synonyms & Antonyms Dictionary
Synonyms & Antonyms Dictionary
Include 50000+ English words
Free

This app serves as a pocket resource for English synonyms and antonyms, offering over 11,200 entries with definitions and usage examples. It features a powerful search system, a favorites list, and a history of viewed words, all presented in a modern, user-friendly design.

11,200+ synonyms and antonymsDefinitions and usage examplesPowerful search system
🔧 Utilities
(6)
free
17
Kids Dictionary
Kids Dictionary
Kids Dictionary
Definitions kids understand
Free
$6.99 | 100% OFF

This app offers a safe and calm learning environment for young children to build vocabulary. It provides clear pronunciations, letter-by-letter spelling, and simple definitions, all within a distraction-free interface.

Clear spoken pronunciationLetter-by-letter spellingAge-appropriate definitions
📚 Education
(9)
free with in-app purchases
18
Smart Dictionary: AI Powered
Smart Dictionary: AI Powered
Smart Dictionary: AI Powered
Smart dictionary for Everyone
Free
📚 Education
(0)
19
One Dictionary
One Dictionary
One Dictionary
Extensible offline dictionary
Free
🔍 Reference
(0)
20
Dictionary Application
Dictionary Application
Dictionary Application
English Dictionary
Free
📚 Education
(0)

FAQ about Dictionary App

What is the best dictionary app for iPhone?
Merriam-Webster Dictionary tops our dictionary app ranking as of August 2026, with a 4.8-star average from 324K App Store ratings, and it's free to download.
Yes — 20 of the top dictionary app we rank are free to download, including Merriam-Webster Dictionary and Dictionary.com: English Words.
Merriam-Webster Dictionary shows ads and offers in-app purchases, according to its App Store listing as of August 2026.
We track 250+ dictionary app on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
This app provides access to America's most respected dictionary, continuously updated with new words and meanings. It's designed for English language reference, education, and vocabulary building, offering features like offline access, voice search, and a thesaurus.
Key features include offline access to definitions and synonyms, voice search, a daily 'Word of the Day,' word games for vocabulary testing, favorite word tracking, and an integrated thesaurus with over 200,000 word choices. It also offers audio pronunciations by real English speakers.

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