Best American English Dictionary Apps

245+ iOS apps curated and reviewed

4.5 avg rating
18 free apps
Updated August 2026

Looking for free american english dictionary apps? 18 of our 245+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Compare top American English Dictionary Apps (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
4Advanced English Dictionary+Advanced English Dictionary+Free4.7★ (913)NoYesAug 2026
5Advanced Dictionary&ThesaurusAdvanced Dictionary&ThesaurusFree4.7★ (4.6K)NoYesAug 2026
6WordWeb DictionaryWordWeb DictionaryFree4.6★ (268)NoNoAug 2026
7Companion SynonymsCompanion Synonyms$1.995.0★ (10)NoNoAug 2026
8American English by NemoAmerican English by NemoFree4.5★ (1.7K)NoYesAug 2026

Top Picks for American English Dictionary

Merriam-Webster Dictionary#1

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Editor's Choice
🔍 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
Dictionary.com: English Words#2

Dictionary.com: English Words by Curiosity Media

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
#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

More American English Dictionary apps to explore

4
Advanced English Dictionary+
Advanced English Dictionary+
Advanced English Dictionary+
American English Dictionary
Free

This app is a comprehensive American English dictionary designed for learners. It features extensive vocabulary, clear definitions, and practical examples to enhance understanding and usage. Users can access audio pronunciations, explore related terms, and save words for future reference.

Extensive vocabulary and phrasesUsage examples and collocationsAmerican English pronunciation with audio
🔍 Reference
(913)
free with in-app purchases
5
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
6
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
7
Companion Synonyms
Companion Synonyms
Companion Synonyms
UniDict® Powered
$1.99

Access a vast thesaurus with over 2.5 million synonyms and related terms. Enjoy advanced search features, offline functionality, and seamless integration with other compatible dictionaries.

2.5 million synonyms and related termsReal-time progressive look-upWildcard and partial searches
🔍 Reference
(10)
paid
8
American English by Nemo
American English by Nemo
American English by Nemo
Easy, fast and fun learning
Free

Learn essential English words and phrases with native speaker audio. Master your accent using speech recognition and practice offline. This app focuses on everyday conversations and builds confidence without formal lessons.

Native speaker audio for essential words and phrasesSpeech Studio for accent masteryOffline access to all audio content
✈️ Travel
(1.7K)
free with in-app purchases
9
Dictionary & Translator
Dictionary & Translator
Dictionary & Translator
Learn and Translate Languages
Free

Access trusted definitions, thesaurus, and pronunciations for numerous languages. Translate text and images offline or online, and enhance your learning with vocabulary challenges and grammar checking.

Offline dictionary and thesaurusCross-cultural text and image translationVocabulary challenges and grammar checking
📚 Education
(13K)
free with in-app purchases
10
Idioms and Slang Dictionary
Idioms and Slang Dictionary
Idioms and Slang Dictionary
Phrase meanings and history
Free

Explore the meanings and origins of over 61,000 idioms, slang terms, proverbs, and expressions. Understand conversational English like a native speaker with definitions, historical context, and example sentences.

Definitions from top sourcesHistory and origin of phrasesExample sentences
🔍 Reference
(1.1K)
free with in-app purchases
11
American Heritage® Dictionary
American Heritage® Dictionary
American Heritage® Dictionary
UniDict® - 4th Edition (AHD4)
$12.99

Access a comprehensive digital dictionary with nearly 300,000 terms and thousands of sound files. Features include advanced search, etymology, and AI-powered tools for deeper understanding and language learning.

Full dictionary text33,000+ example sentences64,000+ recorded sound files
🔍 Reference
(199)
free with in-app purchases
12
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
13
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
📚 Education
(897)
free with in-app purchases
14
Vietnamese Dictionary PEnglish
Vietnamese Dictionary PEnglish
Vietnamese Dictionary PEnglish
English Vietnamese Dictionary
Free

This comprehensive app offers an offline English-Vietnamese dictionary with extensive word explanations and sentence translation. It also provides tools for vocabulary learning, exam preparation, and practicing all four language skills through games, videos, and grammar lessons.

Offline English-Vietnamese dictionaryVocabulary learning with gamesExam preparation and mock tests
📚 Education
(18K)
free with in-app purchases
15
MyWebster28
MyWebster28
MyWebster28
Websters 1828 Dictionary
Free
🔍 Reference
(0)
16
All English Dictionary
All English Dictionary
All English Dictionary
by ILHWAN CHO
Free

Access a comprehensive collection of English dictionaries and thesauruses in one place. Search words across multiple sources simultaneously, including Urban Dictionary, Merriam-Webster, and Oxford. Track your vocabulary progress with curated lists for standardized tests.

Simultaneous dictionary searchMultiple dictionary sourcesThesaurus integration
📚 Education
(4)
ad-supported
17
Synonyms - English dictionary
Synonyms - English dictionary
Synonyms - English dictionary
Exploring words, synonyms app
Free

Enhance your writing by discovering the perfect words. This application provides quick access to synonyms to make your reports, emails, and documents more professional. Features include a user-friendly interface and fast search capabilities.

Find best possible synonymsUser friendly interfaceFast reaction time
📚 Education
(4)
free
18
English Dictionary - Offline & FREE
English Dictionary - Offline & FREE
English Dictionary - Offline & FREE
by Thi Vo
Free
📚 Education
(0)
19
Macmillan American Dictionary
Macmillan American Dictionary
Macmillan American Dictionary
Macmillan American Dictionary
Free

This comprehensive American English dictionary offers over 100,000 references and 80,000 examples, featuring clear definitions and up-to-date information on new words and spoken English. It includes advanced search functions, vocabulary grouping, and the ability to bookmark favorite words.

Over 100,000 references80,000 examples of words in useUp-to-date information on new words
📚 Education
(39)
free
20
Dictiona: English Dictionary
Dictiona: English Dictionary
Dictiona: English Dictionary
Meanings, Synonyms & Words
Free
📚 Education
(0)

FAQ about American English Dictionary

What are the best american english dictionary apps for iPhone?
Merriam-Webster Dictionary tops our american english dictionary apps ranking as of August 2026, with a 4.8-star average from 324K App Store ratings, and it's free to download.
Yes — 18 of the top american english dictionary apps 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 245+ american english dictionary apps 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.