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Best American English Dictionary Apps

210+ iOS apps curated and reviewed

4.7 avg rating
18 free apps
Updated May 2026

Looking for free american english dictionary apps? 18 of our 210+ tracked titles are free to download — no subscription, no trial. The rest are premium picks worth paying for.

Top Picks for American English Dictionary

Dictionary.com: English Words#1

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

Dictionary, Thesaurus, Vocab
Editor's Choice
🔍 Reference
4.8😐(328K ratings)
FreeAdsIn-App Purchases
#94in Reference
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 the ultimate English language learning app packed with quizzes, games, and over 2 million definitions and synonyms. Enhance your vocabulary with word puzzles and daily challenges, enjoy dark mode, offline access, voice search, and more. Improve your English skills effortlessly!

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
Merriam-Webster Dictionary#2

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Strong Contender
🔍 Reference
4.9😊(3.2K 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 a premier iOS app for English language reference, education, and vocabulary building, with new word games and quizzes for learning. Features universal access, offline capabilities, voice search, daily word learning, thesaurus, example sentences, and pronunciations by real speakers. Enjoy features like favorite word syncing and Apple Watch integration. Subscribe to remove ads and access extra resources. Manage your subscription easily. Terms of Use: [Link to Terms of Use].

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
Oxford Dictionary & Thesaurus#3

Oxford Dictionary & Thesaurus by MobiSystems, Inc.

Thesaurus & Offline Vocabulary
Worth Considering
🔍 Reference
4.6😐(28K ratings)
FreeAdsIn-App Purchases
#82in Reference
Oxford Dictionary & Thesaurus screenshot 1
Oxford Dictionary & Thesaurus screenshot 2
Oxford Dictionary & Thesaurus screenshot 3
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Oxford Dictionary & Thesaurus screenshot 6

Access one of the highest authorities in language reference with the power of 15 major Oxford dictionaries at your fingertips. Explore advanced search and learning tools for a comprehensive linguistic experience.

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
Idioms and Slang Dictionary
Idioms and Slang Dictionary
Idioms and Slang Dictionary
Phrase meanings and history
Free

Discover the essence of idioms and slang with a comprehensive dictionary offering meanings, history, and examples for over 61,000 terms, including idioms, slang, proverbs, and more. Search, learn, and master conversational English with clear definitions, audio pronunciations, and bookmark features. Explore the world of idiomatic expressions and download now for a free, authoritative resource.

🔍 Reference
(1K)
5
American English by Nemo
American English by Nemo
American English by Nemo
Easy, fast and fun learning
Free

Immerse yourself in a fun and easy English learning experience with an app that focuses on essential words and phrases, accent mastery, and personal progress tracking. Practice English anytime, anywhere with native speaker audio and personalized learning features. Download now for free!

✈️ Travel
(1.6K)
6
Vocabulary - Wörter lernen
Vocabulary - Wörter lernen
Vocabulary - Wörter lernen
Erweitern Sie Ihren Wortschatz
Free

Improve your vocabulary effortlessly with an app designed to enhance word power. Customize difficulty levels, select categories, and reach linguistic goals all at your own pace. Start expanding your English language skills now!

📚 Education
(1.9K)
7
Advanced English Dictionary+
Advanced English Dictionary+
Advanced English Dictionary+
American English Dictionary
Free

An advanced-level monolingual dictionary for learners of American English, featuring 145,000 words, 85,500 examples, pronunciation guides, and vocabulary expansion tools. With offline support, fast search, and various learning features, enhance your English language skills on-the-go. Explore more with the premium version for only 9.99$. Visit the privacy policy and terms of use links for more information.

🔍 Reference
(886)
8
WordWeb Dictionary
WordWeb Dictionary
WordWeb Dictionary
Offline ad-free dictionary
Free

Discover a comprehensive offline dictionary and thesaurus with fast search, spelling suggestions, definitions, synonyms, and more. Enjoy ad-free browsing, usage examples, and unique search features without the need for an internet connection. Explore WordWeb Dictionary for a seamless word lookup experience.

🔍 Reference
(243)
9
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
Advanced Dictionary&Thesaurus
English dictionary with Audio
Free

An innovative language tool designed to enhance vocabulary skills through interactive word meanings, synonyms, antonyms, and example sentences. Expand your linguistic knowledge effortlessly!

🔍 Reference
(4.3K)
10
Dictionary.
Dictionary.
Dictionary.
by TheFreeDictionary.com
Free

Discover a comprehensive Dictionary and Thesaurus app with a Word of the Day feature, offline access, and resources from top sources. Access millions of definitions, synonyms, translations, and more for a versatile language tool.

🔍 Reference
(14K)
11
American Heritage® Dictionary
American Heritage® Dictionary
American Heritage® Dictionary
UniDict® - 4th Edition (AHD4)
$12.99

Access the comprehensive American Heritage® Dictionary app for instant access to over 300,000 terms and 64,000 sound files, making it the largest mobile dictionary available. Experience features like cross-referencing search, wildcard searches, and spelling suggestions for the ultimate language reference tool.

🔍 Reference
(189)
12
Dictionary & Translator
Dictionary & Translator
Dictionary & Translator
Learn and Translate Languages
Free

A versatile application offering an extensive database of words, meanings, and synonyms. Users can easily look up definitions, translations, and related terms with a user-friendly interface. Try it out for quick and accurate word references!

📚 Education
(12K)
13
English Dictionary: LMDict
English Dictionary: LMDict
English Dictionary: LMDict
Dictionary English Offline
Free

Enhance your English learning with a comprehensive vocabulary resource offering grammar, thesaurus, and collocations dictionary. Access 230,000 words with examples in natural English, collocations, synonyms, and more. Improve your language skills with this ultimate English learner's tool. Explore now!

📚 Education
(875)
14
English Dictionary *
English Dictionary *
English Dictionary *
Thesaurus and Vocabulary words
Free

Access a comprehensive offline English dictionary with over 4000 essential words at your fingertips. Enhance your vocabulary, improve language skills, and understand definitions without needing an internet connection.

🔍 Reference
(1.1K)
15
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Merriam-Webster Dictionary+
Premium Ad-free Dictionary
$9.99

Access a premium ad-free dictionary app for iPhone, iPad, and Apple Watch with offline capabilities, new word games, and features like integrated thesaurus, vocabulary-building quizzes, voice search, and word of the day. Perfect for English language reference and vocabulary building. Find out more by checking the Application License Agreement and App Privacy Policy.

🔍 Reference
(22K)
16
Etymonline English Dictionary
Etymonline English Dictionary
Etymonline English Dictionary
Dictionary to Build Vocabulary
Free

A comprehensive English dictionary app offering word origins and vocabulary building tools. Features include instant search with spelling suggestions, offline dictionary access, related words, and premium ad-free and offline functionality. Explore word roots and enhance your vocabulary effortlessly.

📚 Education
(11K)
17
WordReference Dictionary
WordReference Dictionary
WordReference Dictionary
by WordReference.com, LLC
Free

Access the powerful dictionary and translation tools of the most popular website with this app. Instantly look up translations in multiple languages, access forums with millions of Q&A, and utilize conjugators and synonyms. Don't misspell "WordReference" when searching!

🔍 Reference
(5)
18
Power Thesaurus
Power Thesaurus
Power Thesaurus
Comprehensive. Fast. Reliable.
Free

Discover a powerful, community-driven online platform offering a vast collection of synonyms, antonyms, and word associations for writers and students. Enhance your writing experience with user-friendly tools, personalized search results, and ad-free option. Join the community, contribute new terms, and access account features for an improved writing journey.

🔍 Reference
(2.9K)
19
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary Offline - Dict Box
Dictionary for All Languages
Free

Discover a comprehensive offline dictionary app for all languages with Dict Box. Access definitions, translations, and synonyms on-the-go. Download now for quick and easy language reference.

🔍 Reference
(11K)
20
Vietnamese Dictionary PEnglish
Vietnamese Dictionary PEnglish
Vietnamese Dictionary PEnglish
English Vietnamese Dictionary
Free

Access a comprehensive and innovative English-Vietnamese dictionary app with offline accessibility and advanced search features for free on the Appstore. Perfect for quick translations on-the-go!

📚 Education
(18K)