▶Special discount◀
$24.99 -> $19.99

The complete DioDict English Dictionary • 184,500 words, meanings and examples • Thousands of notes on grammar and ways to use words • No internet connection needed.

**Free upgrade available for DioDict 3.5 English Dictionary users.
If you are using DioDict 3.5, please note that each version has different functions. Wordbook/History functions may not be available in the newest version due to database replacement. **

=====Powerful & Specialized Functions=====
▶ Easier Search with 'Multi Search' ◀
• When you enter a word to search, relevant sentence idioms and phrasal verbs are searched for and spelling is checked automatically.
• Multiple types of searches are available in a single search window without the need to select a search mode.

▶ Search Features ◀
• Wildcard search: enter “?” or “*” in place of a letter when you are unsure of the spelling (e.g., “man*ver” retrieves the word “maneuver”).
• Search not only for words, but for phrases or examples.
• The spell check function corrects typos - if you are unsure of the spelling or mis-type a word, a list of similar words is offered.
• Search for similar words: e.g. clicking on “adding” in an entry yields a list of similar and derivative words: “addition”, “additional”, “additive”, “addition reaction”.
• The search results are listed in real-time when you enter a keyword.
• Links to Google so that you can search for more information on a particular word.

▶ Vocab Revision ◀
• Pronunciation guide from the built-in American Text To Speech (TTS) solution.
• History menu lists all your recent word searches.
• Save words and expressions to any number of flashcard folders.
• You can efficiently learn the words saved in the folders using the Cradle and Yes/No Quizzes function.

=====Contains Rich Content =====
This app includes content from the Oxford Advanced Learner's Dictionary, 8th edition, 2010.
Imagine having the top selling English learner’s dictionary in your pocket!

Dictionary features include:
• 184,500 words, phrases and meanings from British and American English. British/American-only words are specially marked.
• Thousands of examples of real English showing learners how a word is normally used.
• Text to speech engine so you can listen to American and British native speaker's pronunciation of words and sentences.
• 1,000 newly coined words, such as ‘podcast', 'wiki', 'carbon footprint', 'social networking', and 'tiger economy'.
• 7,000 synonyms and antonyms as well as 5,000 words related to science, literature, computers, and business.
• Explanations and examples use natural, easy-to-understand English.
• A pronunciation guide (IPA) with word stress shown next to each word entry.
• Large amount of grammatical information:
-- parts of speech (noun, verb, adj. etc.) of each word.
-- irregular verb forms and noun plurals.
-- which prepositions are used with which verbs and adjectives.
-- whether a noun is countable or uncountable.

=====Reliable Dictionary App Provider=====

***Electronic Dictionary Application Chosen by Top Smartphone Manufacturers, such as Samsung and LG.
- Installed on over 90% of Samsung and LG smartphones with users all over the world. Highest market share for dictionary applications.
*** The Number One Company in the Domestic Mobile Electronic Dictionary Market for Over 10 Years, with Over 100 staff in R&D.
- The company’s own testing department performs meticulous testing, along with a customer support department.

■ CS center :

Our company name is now 'SELVAS AI' officially changed from DIOTEK.
The new name reflects our dedication to Artificial Intelligence technology, all of us at SELVAS AI strive to do our best for our customers.

What's New

Version 4.0.11

- Change customer inquiry method
- Other bugs fix

Ratings and Reviews



Wonderful app!! Fast, responsive and attractive interface! They have taken an excellent dictionary and improved on it! Good job Diodict! This is the second time I've purchased your product. The first time I bought the Dongsan Prime Eng-Kor Kor-Eng Dictionary. The experience was so wonderful that it gave me confidence to buy this app just minutes after chancing upon in iTunes.

I didn't search for reviews online or checked around. Your reputation gave me enough confidence! All in all, wonderful product! It's worth every penny! What's more, it comes with TTS (text to speech), a feature that the CD-Rom of OALD 7 that I had installed on my laptop didn't have! You've taken the legendary Oxford Advanced Learner's Dictionary (OALD) to another level! Guys, don't hesistate! BUY THIS NOW!

A huge disappointment, a rubbish compared to the old version. I want to go back!


This version is a huge disappointment. There is only audio pronunciation in North American accent. Where is the British accent which is very helpful for learners? I paid for this dictionary app because of the British accent. I'm currently live in the UK. This is Oxford dictionary, it is supposed to have British accent, please give it back.
Now, you have to tap on the word to hear the audio, you could have done it easily right on the search menu in the old version.
Where is the writing feature, when you can search by writing a word on the screen? It was so fun doing it sometime. And the "?" and "*" symbol, which were placed in a very convenient place, where are they?
The new appearance looks so old, boring and hideous just like any other dictionary app while the old one look much better and more suitable for young people.
I have been using a lot of dictionary app. This app was the best. Now, this is rubbish! They got rid of everything I love and all the fun. Please show my the way to come back to version 3.5.

Best advance Lerner's dictionary


This is actually the oxfords advanced Lerner's dictionary. I'm guessing that because they don't pay royalties anymore they are not allow to say that. But it used to have oxford name, not anymore. Botton line, it's the same dictionary with better price.
I actually find this app better made from a functionality point of view. Way better than the oxford one. Less is more in this case.


282.8 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Korean
Age Rating
Rated 4+


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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