「ハングル」辞書付き韓国語キーボード
A Hangeul keyboard for Japanese speakers that works in any app and includes a built-in Korean–Japanese dictionary with about 170,000 entries.
Apps · 58
Our Past Apps
Dictionary, language, and reference apps for iPhone, iPad, and Mac by Enfour, with content from Oxford, Longman, American Heritage, Kenkyusha, and more.
Overview
Dictionary, language, and reference apps from Tokyo
Enfour, Inc. builds dictionary, language-learning, and reference apps for iPhone, iPad, and Mac, plus a small set of utilities and developer tools. The catalogue covers English–English and bilingual dictionaries, thesauri, vocabulary builders, Japanese reference titles with AI features, and Korean, Chinese, and Thai dictionaries.
- 58 apps in 9 categories and 12 language combinations.
- Licensed content from publishers such as Oxford, Longman, American Heritage, and Kenkyusha.
- Decades of CJK text expertise, from Enfour’s Japanese typography to today’s apps.
Browse by category
Browse by language
- English–English (25)
- English–Japanese (11)
- Japanese (7)
- English (4)
- Korean–Japanese (3)
- English–Thai (2)
- Japanese–English (1)
- Korean–English (1)
- Korean–Chinese (1)
- Korean (1)
- English–Tagalog–Japanese (1)
- Japanese–Korean–Chinese–Thai (1)
Featured
FrontierStack: server management for the Mac
Enfour’s native Mac app for monitoring and managing servers, services, and devices, with an AI administrator that never sees your passwords.
All apps
Every Enfour app, A–Z
100 Science Words College Graduate Should Know
From the American Heritage® 100 Words series: 100 science terms every college graduate should know, each with an explanation.
100 Words Almost Everyone Mispronounces
From the 100 Words series: 100 words people often mispronounce, with explanations and audio of the correct pronunciation.
100 Words Every Word Lover Should Know
From the American Heritage® 100 Words series: 100 words picked for language lovers, from "aesthetic" to "zenith."
100 Words Everyone Confuses and Misuses
The American Heritage® editors' selection of 100 commonly confused and misused English words, with guidance on the correct usage of each.
100 Words for Lovers ♥
One hundred words about love and romance, chosen for the best-selling 100 Words series from the American Heritage® editors.
100 Words High School Freshman Should Know
From the American Heritage® 100 Words series: 100 words for students starting high school.
100 Words High School Graduate Should Know
From the American Heritage® 100 Words series: the 100 words its editors think every high school graduate should know.
American Heritage Dictionary 5
The Fifth Edition of The American Heritage® Dictionary of the English Language as a mobile app.
American Heritage® Deluxe
The American Heritage® Dictionary (Fourth Edition) bundled with Roget's II: The New Thesaurus and native-speaker audio.
American Heritage® Dictionary
The American Heritage® Dictionary, Fourth Edition, with nearly 300,000 terms and tens of thousands of native-speaker audio recordings.
American Heritage® Medical
The American Heritage® Medical Dictionary, a medical terminology reference for students, healthcare professionals, and general readers.
AOD (InApp)
An in-app-purchase edition of the complete Australian Oxford Dictionary, Second Edition, with sound.
Australian Oxford Dictionary
The complete Australian Oxford Dictionary, Second Edition, a reference for contemporary Australian English, with sound.
Companion Synonyms
Grady Ward's Moby Thesaurus II, with 30,260 root words and over 2.5 million synonyms and related terms.
Companion Thesaurus
A thesaurus with over 145,000 headwords, each listing synonyms, antonyms, and broader terms.
Enfour PowerWatch
Monitors the Macs, Linux, and Windows servers, routers, NAS devices, smart plugs, and UPS units on your network.
Find! TOKYO
A bilingual guide map app for exploring Tokyo.
FrontierStack
A native Mac app for monitoring and managing your servers, services, and devices, with an AI administrator that never sees your passwords.
Global Guide
A Japanese-language world reference covering 203 countries and regions.
Hangeul – Dictionary Keyboard
A bilingual Hangeul keyboard for English speakers with a built-in dictionary, so you can check the meaning of Korean words while typing in any app.
Japan Nightlife
A nightlife guide to Tokyo and the rest of Japan, covering clubs, bars, live houses, events, and late-night services such as ATMs and currency exchange.
KeyRotate
A developer tool that monitors API keys and AI subscriptions and helps replace them when they need rotating.
Korean Handwriting Keyboard
A keyboard that recognizes handwritten Korean characters.
Korean/Japanese AI Dictionary
A Korean toolkit for Japanese speakers that combines a dictionary, translator, phrasebook, and bilingual keyboard.
LDOCE (InApp購入版) – ロングマン現代英英辞典
An in-app-purchase edition of the Longman Dictionary of Contemporary English (6th edition) for iOS and macOS.
Longman 4000 Examples
A simple listening trainer for Japanese learners of English that plays over 4,000 example sentences taken from the Longman English–Japanese Dictionary.
Longman 英和会話術
A companion for Japanese speakers learning English, drawing supplementary notes from Longman's English–Japanese and learner's dictionaries.
Luminous E-J Dictionary
An in-app-purchase edition of Kenkyusha's Luminous English–Japanese and Japanese–English dictionaries, each with about 100,000 entries, plus audio.
Nikkei shinbun no suuji ga wakaru hon
A Japanese-language guide to the economic indicators printed in the Nikkei newspaper.
Nuance Translator
A translator that adjusts tone, politeness, and emotion for Japanese, Korean, Chinese, and Thai based on who is speaking, who is listening, and the setting.
Oxford Deluxe (InApp)
An in-app-purchase edition of the Oxford Dictionary of English and Oxford Thesaurus of English (second editions), with audio.
Oxford Deluxe (ODE and OTE)
Oxford's largest single-volume English dictionary and thesaurus in one app: the full Oxford Dictionary of English and Oxford Thesaurus of English (both second editions), with audio pronunciations.
Oxford Dictionary of English.
The complete Oxford Dictionary of English, Second Edition, Oxford's largest single-volume English dictionary.
Oxford River Books Concise
The Oxford-River Books Concise English–Thai Dictionary, a leading English–Thai reference.
Oxford Thesaurus of English.
The Oxford Thesaurus of English, Second Edition, in full, along with its extra reading and reference material.
Oxford Wordfinder
Themed word lists drawn from the supplementary material of the Oxford Thesaurus of English.
Oxford-RiverBooks Thai (InApp)
An in-app-purchase edition of the Oxford-River Books Concise English–Thai Dictionary.
POSTpone❢ ⌚send email later
Write an email now and get a reminder to send it later.
Roget’s II: New Thesaurus
The complete Roget's II: The New Thesaurus on iPhone, supplemented with Grady Ward's Moby Thesaurus II.
Sakura Japanese Dictionary
An English–Japanese and Japanese–English dictionary based on the long-running EDICT project, a widely used open Japanese–English reference to which Enfour has contributed.
Sakura Japanese-Korean Dict
A Korean–Japanese bilingual dictionary for Korean speakers learning Japanese.
Sakura Kanji Dictionary
A detailed kanji dictionary with 13,108 character entries and about 10,000 stroke-order animations.
Send It Later (time-shift your email & SMS)
Write an email or SMS now and get a reminder to send it at the right time.
Special KB
An adaptive keyboard that works out what you meant to type rather than just fixing spelling.
SpellChecker ✔ Email, SMS, Twitter & SNS
An English spell checker for composing emails, SMS, and social posts before you send them.
Tagalog PhraseBook
An offline phrasebook with thousands of ready-translated phrases connecting English, Tagalog, and Japanese, organized by topic.
The Yale Book of Quotations
More than 13,000 quotations and proverbs from Yale University Press's The Yale Book of Quotations, edited by Fred R.
Wall Street Words
The complete Wall Street Words, an A–Z guide to investment terms, with links into the American Heritage® dictionaries.
アインシュタイン式論理脳ドリル
A Japanese-language logic puzzle game built on the style of the famous "Einstein" riddle.
サプリメント効き目事典
A Japanese reference on supplements organized by condition and symptom, based on the Japanese edition of the Natural Medicines database.
ルミナス 英和・和英辞典
Kenkyusha's Luminous English–Japanese and Japanese–English dictionaries in one app, each with about 100,000 entries, enhanced with Longman British and American audio.
ロングマン現代英英辞典【6訂版】
The Longman Dictionary of Contemporary English (6th edition) for iPhone and iPad, a learner's dictionary whose definitions use a core vocabulary of about 2,000 words.
ロングマン英和辞書
Longman's corpus-based English–Japanese dictionary, with native-speaker audio and video content.
信用取引（投資に役立つ小冊子シリーズ Vol.1）
A Japanese e-book about margin trading from Nihon Shoken Shimbun's investment booklet series.
六法先生AI
A Japanese law reference holding 209 current statutes and more than 40,000 articles on the device.
税務AI手帳2027年版
A tax handbook app for Japanese tax and accounting professionals that combines a reference list of major taxes with a monthly tax calendar, updated for the FY2026 (Reiwa 8) tax reforms.
韩语词典键盘
A Korean (Hangeul) keyboard for Chinese speakers with a built-in dictionary of about 360,000 entries.
FAQ
Frequently asked questions about Enfour apps
Who makes Enfour apps?
Enfour, Inc. is a Tokyo software company that has built multilingual and CJK text software since 1993. Most apps are developed and published by Enfour; a few in-app-purchase dictionary editions are published with English Channel, Inc.
Which devices do the apps run on?
Most Enfour apps are for iPhone and iPad and are available on the App Store. FrontierStack and some utilities run on the Mac, and each app page lists its platforms and system requirements.
Whose dictionary content do the apps use?
Enfour’s dictionary apps are built on licensed content from publishers including Oxford, Longman, American Heritage, Kenkyusha (研究社), Sanseido (三省堂), and Shogakukan (小学館). Each app page names its dictionary source where one applies.
How do I find an app for my language pair?
Use the Browse by language links on this page. Each language archive, such as English–Japanese or Korean–Japanese, lists every Enfour app for that pair.
Where do I get help with an app?
Use the Contact page to reach Enfour about any app. Each app page also links to its App Store listing or website.