Comparison

E.J.C Science&Tech Dictionary vs Luminous E

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

E.J.C Science&Tech Dictionary

This application provides a quick reference for scientific and technical terms in English, Japanese, and Chinese. It offers offline access to a large database of words, allowing for fast lookups and easy navigation through search history and bookmarks.

Highlights
  • Offline dictionary access
  • English, Japanese, Chinese terms
  • Search by prefix or partial match
  • Bookmark and history functions
  • Quick word lookups
  • Large word database
Features
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If your job involves Japanese/Chinese words in the field of Science & Technology, maybe this application can help you to finish your work quickly and correctly, because it is an application running on iPhone/iPod Touch, not a heavy book, you can take it out, and look up your words quickly as long as you want to do. This application collected 552,707 well-used words (English/Japanese/Chinese(s)) in the field of Science & Technology from various aspects, such as Machinery, Computer, Electronics, Engineering, Telecommunication, Chemistry, Energy, Biology and so on. we hope this application can give you a big help. Features: 1, Easy to use and offline. Just input the word(English/Japanese/Chinese) in the searching field and the searching result will be displayed. User can set searching mode to prefix or partial. Drag the screen up and new words in the searching result will be showed automatically. 2, Bookmark & history function. You can put the important word to bookmark by touching the '+' button on detail screen. Every word you referenced will be add to history automatically. 3, English, Japanese, Chinese are supported on the detail screen. If a word has meaning in English, Japanese, Chinese at the same time, all the word will be showed on the detail screen. Tapping the word on detail screen, it will be inputed into searching field, so you can perform a new searching. 4, Large volume. There are 552,722 well-used words(English/Japanese/Chinese(s)) in this application, it can fulfill your needs in most case. Supported language: English, Japanese, Chinese Notice: 1, Partial searching mode is faster than prefix mode in searching word of Chinese/Japanese. 2, This application only give a quick reference for a word in English and corresponding Japanese and Chinese, NOT the explanation of the word. 3, It is NOT TRUE that a word in English is always followed by the corresponding Japanese and Chinese. 4, It takes more time in searching word of Japanese/Chinese than in English, and the latest device(3GS) always has a very faster response than the old one in searching operation.

About

Luminous E

This comprehensive English-Japanese and Japanese-English dictionary app offers extensive vocabulary and grammar explanations. It includes audio pronunciations, search functionalities, and export options, making it a powerful tool for all English learners.

Highlights
  • Extensive vocabulary (approx. 100,000 entries each)
  • Audio pronunciations for words
  • Incremental search and spelling suggestions
  • Bookmark with notes
  • Export definitions and bookmarks
  • Daily vocabulary notifications
  • iPad multitasking and Drag & Drop support
Features
Read full description

ルミナス英和・和英辞典 (InApp購入版) This app is not free! For new users, an InApp purchase is required to activate the dictionary. Japanese language ability required. 英和・和英それぞれ約10万の豊富な収録語句に加え、アプリ独自に単語の英米音声ファイルを収録。もちろんiPhone・iPad両対応。大学入試からTOEIC®受験まで、全ての英語学習者にお薦めする学習用英和・和英辞典の「最強ツール」です。 【全体】 総収録語数は英和・和英各10万,用例は各 5 万以上。豊富な語彙だけでなく、文法や語法、ライティングのための解説も充実させた、英語学習辞典の定番。大学受験生から社会人まで全ての英語学習者・使用者にお勧めの最強ツール。 【英和】 日常用語はもちろん、時事用語、科学用語を豊富に収録し、成句や句動詞も充実。語彙だけでなく、詳細な文法・語法解説に加え、ライティングにも使える「コロケーション」や「言い換え」、語彙増強のための「単語の記憶」や「語源」など、学習・実用に役立つ情報が満載。英和辞典として初めてTOEIC®頻出2千語句を表示。 【和英】 「振り込め詐欺」「ニート」「認知症」から「源義経」「額紫陽花」「丑の時参り」まで広範な分野の語彙・慣用句・成句を採録。日本固有の風物・文化・固有名などには簡潔な英語の説明も施した。日本語的発想を自然な英語にするために不可欠な「発想指示」や学習者の間違えやすい点を分かりやすく解説した「語法」「日英比較」も充実。 ■ アプリケーションの特徴: * ロングマンシリーズの約90,000点の英米音声ファイルを収録 * 単語タップで表示される、便利なリンクメニュー * インクリメンタル検索(逐次検索)機能 * スペリングのサジェスト機能 * ワイルドカード検索機能 * 収録画像の拡大・縮小機能 * メモ付きブックマーク機能 * 語義やブックマークをメールやFacebook, Twitterなどに出力可能 * 自動履歴機能 * 書籍の付録部分を収録 * AI強化アナグラム生成機能 * "今日"とロックスクリーンのウィジェット * iCloudを利用したブックマーク機能 * 日替わり英単語の通知機能。(TOEIC®やTOEFL®の単語リスト付き) * 3D Touch 対応 * DarkMode 対応 * iPadのマルチスクリーンとDrag & Drop 対応 * iPhone 17 対応 * iOS12〜iOS26 完全対応 * iPhoneとiPodとiPadとmacOS 対応 ■ 外部辞書ハイパーリンク機能 * 「ロングマン現代英英辞典」や「アメリカンヘリテージ® 」など英英辞典へのリンク * 「Roget's II: 新類語辞典」へのリンク * 「ロングマン英和辞典」へのアプリケーションリンク * 「大辞林」「大辞泉」へのアプリケーションリンク (外部辞書は別途インストールが必要です) コピーライト: ルミナス英和辞典 (第2版)/ルミナス和英辞典 (第2版) © 2005, 2012 株式会社研究社

Screenshots

E.J.C Science&Tech Dictionary1 screens
Luminous E4 screens

Verdict

The call

The clearest difference is price: Luminous E at Free against E.J.C Science&Tech Dictionary's $3.99. Luminous E also leads on update cadence (every 5 weeks vs every 13 months) and review sentiment (24% vs 0%). E.J.C Science&Tech Dictionary's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Luminous E is free to download; E.J.C Science&Tech Dictionary costs $3.99 up front. Luminous E sells 1 one-off in-app purchase. E.J.C Science&Tech Dictionary asks for nothing beyond the download.

UpkeepUpdate frequency

E.J.C Science&Tech Dictionary ships an update every 13 months, Luminous E every 5 weeks. The most recent releases landed on September 27, 2026 and September 21, 2026 respectively.

Scorecard6 real differences · 4 level
E.J.C Science&Tech Dictionary versus Luminous E: the parameters behind the verdict, then further details
ParameterE.J.C Science&Tech DictionaryLuminous E
Price$3.99Free — better
Rating—4.0 (6 ratings) — better
Positive reviews0.0% of reviews23.5% of reviews — better
Number of ratings—6 — better
Update frequencyEvery 13 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.612.0 — better
Further details — not scored
Size67 MB1021 MB
Age rating4+12+
DeveloperAOBO Co.,LtdEnglish Channel, Inc.

Customer experience

E.J.C Science&Tech Dictionary

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Luminous E

All ratings6 ratings
Positive66.7%
Neutral16.7%
Negative16.7%
Written reviews17 reviews
Positive23.5%
Neutral23.5%
Negative52.9%

In-app purchases

None

E.J.C Science&Tech Dictionary

No in-app purchases

1 purchases

Luminous E

One-time1
  • Luminous activation$14.99

Questions

Is E.J.C Science&Tech Dictionary free?
E.J.C Science&Tech Dictionary costs $3.99, with no in-app purchases.
Is Luminous E free?
Luminous E is free to download, with in-app purchases available.
Do E.J.C Science&Tech Dictionary or Luminous E have ads?
Neither E.J.C Science&Tech Dictionary nor Luminous E shows ads.
Which is updated more often, E.J.C Science&Tech Dictionary or Luminous E?
E.J.C Science&Tech Dictionary ships an update every 13 months, and Luminous E every 5 weeks. Most recently, E.J.C Science&Tech Dictionary was updated on September 27, 2026 and Luminous E on September 21, 2026.

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