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Best Dictionary App

250+ iOS apps curated and reviewed

4.5 avg rating
20 free apps
Updated September 2026

With an average user rating of 4.5★, 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 (September 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoSep 2026
2Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (324K)YesYesSep 2026
3Oxford Dictionary & ThesaurusOxford Dictionary & ThesaurusFree4.6★ (29K)NoYesSep 2026
4Vocabulary - Learn words dailyVocabulary - Learn words dailyFree4.8★ (217K)YesYesSep 2026
5Dictionary.Dictionary.Free4.8★ (15K)YesYesSep 2026
6Dictionary and Translation AppDictionary and Translation AppFree—NoNoMay 2026
7AI English DictionaryAI English DictionaryFree—YesNoMay 2026
8Cambrid English DictionaryCambrid English DictionaryFree——NoMay 2026

Top Picks for Dictionary App

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
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
  • 🤩 Great for expanding vocabulary

Room to Improve

  • 🐛 Inconsistent search results and missing definitions
  • 💸 Aggressive ads even after paid upgrades
  • 🤯 Frequent crashes and performance issues
  • 🤔 Confusing layout changes and UI issues
  • 🤷‍♀️ Paid features not always working as expected
Merriam-Webster Dictionary#2

Merriam-Webster Dictionary by Merriam-Webster, Inc.

Strong Contender
🔍 Reference
4.8😊(324K ratings)
FreeAdsIn-App Purchases
#35in 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
  • 👍 Word of the day feature
  • 👍 Fun word games

Room to Improve

  • 🐛 Ads can be intrusive
  • 🐛 Difficulty closing ads
  • 🐛 Repetitive game questions
  • 🐛 Missing words in dictionary
  • 🐛 Unreasonable level progression in games
Oxford Dictionary & Thesaurus#3

Oxford Dictionary & Thesaurus by MobiSystems, Inc.

Etymology & Offline Vocabulary
Worth Considering
🔍 Reference
4.6😐(29K ratings)
FreeIn-App Purchases
#100in 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
  • 👍 Helps with homework or even if you forgot how to spell write or don't know the meaning of a word
  • 👍 Excellent dictionary that has everything you'll ever need
  • 👍 Offline access is very helpful
  • 👍 Detailed definitions including word origins

Room to Improve

  • 🐛 Glitchy, way too many ads
  • 🔒 Annoying popup ads makes it unusable
  • 🔒 Ads stuck in, despite payment
  • 🐛 Never connect the server
  • 🐛 Stopped working
  • 🔒 Annoying popup ads
  • 🐛 Definitions disappear before reading is complete
  • 🔒 Intrusive and persistent ads even in paid version
  • 🔒 Subscription pricing is too high

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FAQ about Dictionary App

What is the best dictionary app for iPhone?
Dictionary.com: English Words tops our dictionary app ranking as of September 2026, with a 4.8-star average from 328K App Store ratings, and it's free to download.
Yes — 20 of the top dictionary app we rank are free to download, including Dictionary.com: English Words and Merriam-Webster Dictionary.
Dictionary.com: English Words shows ads and has no in-app purchases, according to its App Store listing as of September 2026.
We track 250+ dictionary app on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.
This app serves as a comprehensive English dictionary and thesaurus, offering over 2 million trusted definitions and synonyms. It aims to help users improve their English vocabulary, understanding, and writing skills through various features.
Key features include access to millions of definitions and synonyms, a 'Word of the Day' to expand vocabulary, example sentences to show word usage, audio pronunciations, grammar tips, and a search history to track learned words.

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