1. Home
  2. Topics
  3. Online Dictionary

Best Online Dictionary Apps

246+ iOS apps curated and reviewed

4.4 avg rating
19 free apps
Updated August 2026

Every iPhone needs a few good online dictionary apps. We benchmark 246+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Online Dictionary Apps (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Dictionary.com: English WordsDictionary.com: English WordsFree4.8★ (328K)YesNoAug 2026
2Merriam-Webster DictionaryMerriam-Webster DictionaryFree4.8★ (324K)YesYesAug 2026
3Dictionary Offline - Dict BoxDictionary Offline - Dict BoxFree4.6★ (12K)YesYesAug 2026
4Oxford Dictionary & ThesaurusOxford Dictionary & ThesaurusFree4.6★ (29K)NoYesAug 2026
5Dictionary.Dictionary.Free4.8★ (15K)YesYesAug 2026
6WordWeb DictionaryWordWeb DictionaryFree4.6★ (268)NoNoAug 2026
7Dictionary Lao-onlineDictionary Lao-onlineFree—NoNoMay 2026
8English Dictionary - Offline & FREEEnglish Dictionary - Offline & FREEFree—NoNoMay 2026

Top Picks for Online Dictionary

Dictionary.com: English Words#1

Dictionary.com: English Words by Curiosity Media

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

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
4.8😊(324K ratings)
FreeAdsIn-App Purchases
#28in 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 Offline - Dict Box#3

Dictionary Offline - Dict Box by Xung Le

Dictionary for All Languages
Worth Considering
🔍 Reference
4.6😊(12K ratings)
FreeAdsIn-App Purchases
Dictionary Offline - Dict Box screenshot 1
Dictionary Offline - Dict Box screenshot 2
Dictionary Offline - Dict Box screenshot 3
Dictionary Offline - Dict Box screenshot 4
Dictionary Offline - Dict Box screenshot 5

This app provides an offline dictionary and translator for over 50 languages. It offers smart word suggestions, text translation in other apps, offline pronunciation, and a picture dictionary. An optional premium upgrade unlocks advanced features and an ad-free experience.

What We Love

  • 👍 Great app
  • 🚀 Comprehensive dictionaries
  • 🚀 Offline functionality
  • 👍 Helpful features (e.g., pronunciation, synonyms, examples)

Room to Improve

  • 🐛 Dictionaries get deleted after updates
  • 🐛 Crashes and freezes
  • 💡 Lack of dark mode option

More Online Dictionary apps to explore

4
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Oxford Dictionary & Thesaurus
Etymology & Offline Vocabulary
Free

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.

15 Oxford DictionariesThesaurus integrationAudio pronunciations
🔍 Reference
(29K)
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
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
Dictionary Lao-online
Dictionary Lao-online
Dictionary Lao-online
Dico Lao Multi-Lang (offline)
Free
📚 Education
(0)
8
English Dictionary - Offline & FREE
English Dictionary - Offline & FREE
English Dictionary - Offline & FREE
by Thi Vo
Free
📚 Education
(0)
9
Electronic Dictionary Offline
Electronic Dictionary Offline
Electronic Dictionary Offline
by Andrew Putranto
Free
📚 Education
(0)
10
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
11
Serge Dictionary
Serge Dictionary
Serge Dictionary
by ange loron
$9.99
📚 Books
(0)
12
MyWebster28
MyWebster28
MyWebster28
Websters 1828 Dictionary
Free
🔍 Reference
(0)
13
AI English Dictionary
AI English Dictionary
AI English Dictionary
AI Dictionary & Translator app
Free
📚 Education
(0)
14
Smart Words Dictionary
Smart Words Dictionary
Smart Words Dictionary
Words, Idioms & Phrasal Verbs.
Free
📚 Education
(0)
15
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
16
Mechanical Dictionary Offline
Mechanical Dictionary Offline
Mechanical Dictionary Offline
by Andrew Putranto
Free
📚 Education
(0)
17
Serbian−English dictionary
Serbian−English dictionary
Serbian−English dictionary
by Ilya Mukhortov
Free

This app provides a fast and convenient offline Serbian-English and English-Serbian dictionary. It includes a vocabulary trainer to help users learn new words and offers features like instant search, pronunciation audio, and automatic language detection.

Offline dictionaryVocabulary trainerPronunciation audio
📚 Education
(0)
ad-supported
18
English Dictionary 2.0
English Dictionary 2.0
English Dictionary 2.0
Fast and offline dictionary
Free
📚 Education
(0)
19
One Dictionary
One Dictionary
One Dictionary
Extensible offline dictionary
Free
🔍 Reference
(0)
20
Georgian−English dictionary
Georgian−English dictionary
Georgian−English dictionary
by Ilya Mukhortov
Free
📚 Education
(0)

FAQ about Online Dictionary

What are the best online dictionary apps for iPhone?
Dictionary.com: English Words tops our online dictionary apps ranking as of August 2026, with a 4.8-star average from 328K App Store ratings, and it's free to download.
Yes — 19 of the top online dictionary apps 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 August 2026.
We track 246+ online dictionary apps on the iOS App Store as of August 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.

Related searches

digor: online dictionary