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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
🔍 Reference
4.6😐(28K ratings)
FreeAdsIn-App Purchases
#81in 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 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
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
#96in 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#3

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Worth Considering
🔍 Reference
4.9😊(3.2K ratings)
FreeAdsIn-App Purchases
#44in 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

More Free Vocabulary Dictionary apps to explore

4
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)
5
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)
6
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)
7
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Word of the Day・Vocabulary
Vocab Builder & Word Games
Free

Elevate your vocabulary with a daily word companion app designed to enhance your word power effortlessly. From academic to obscure words, this app tailored by linguists recommends personalized words, aids in self-improvement, and offers a vast collection of beautifully narrated word stories daily. Join now and start your journey towards mastering the art of words.

📚 Education
(38K)
8
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)
9
LookUp: English Dictionary
LookUp: English Dictionary
LookUp: English Dictionary
Build vocabulary, a word daily
Free

Build your vocabulary with a daily word and interactive quizzes using an innovative English Dictionary app. Enjoy a comprehensive dictionary, thesaurus, translations, and powerful vocabulary builder for English learners and word enthusiasts.

🔍 Reference
(3K)
10
SpanishDictionary.com Learning
SpanishDictionary.com Learning
SpanishDictionary.com Learning
Translator, Conjugation & More
Free

Learn Spanish easily with a comprehensive application offering translation, conjugation, vocabulary, and grammar help. Start mastering Spanish today!

📚 Education
(195K)
11
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)
12
English Dictionary : Offline
English Dictionary : Offline
English Dictionary : Offline
English to English Vocabulary
Free

Learn English vocabulary easily with this lightweight and elegant dictionary app for iPhones and iPads. Search for over 150,000 English words, take quizzes, save favorites, and more - all offline! Download now to enhance your language skills effortlessly.

📚 Education
(572)
13
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Thesaurus dictionary- Wordloop
Synonyms power up vocabulary
Free

Enhance your writing with a built-in thesaurus keyboard feature that suggests synonyms and antonyms. Seamlessly find alternative words while typing in any app. Terms of use can be found at [link to Terms of Use] and Privacy Policy at [link to Privacy Policy].

🔍 Reference
(258)
14
Vocabulary.com
Vocabulary.com
Vocabulary.com
by Curiosity Media, Inc.
Free

Learn and expand your vocabulary with an addictive game-like experience using a smart and fast dictionary system. Personalized learning, achievements, and real-world examples make it easy to master new words and improve communication skills. Start mastering words with the most effective word learning system available!

📚 Education
(4.9K)
15
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)
16
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)
17
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
FreeSaurus - The Free Thesaurus!
by Weeswares Pte Ltd
Free

Find synonyms and related words easily with a simple and focused thesaurus application. Get quick word meanings and expand your vocabulary effortlessly.

🔍 Reference
(120)
18
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)
19
Dictionary
Dictionary
Dictionary
in Widget
Free

A concise and efficient English to Japanese dictionary application that displays definitions in real-time as you type, providing a seamless and lightning-fast translation experience. Download now to access a comprehensive database of translations at your fingertips.

🔍 Reference
(4)
20
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)

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