iKnow! vs Murray ― 英単語学習
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
iKnow!
Master Japanese, Chinese, and English with this app's adaptive learning engine. It offers multiple study modes and synchronizes your progress across devices for flexible learning. Ideal for anyone looking to efficiently acquire new vocabulary and sentence structures.
- Adaptive learning engine
- Spaced rehearsal pattern
- Five study modes
- Vocabulary and sentence mastery
- Progress synchronization
- Audio playback with speed control
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Enjoy the iKnow! experience on your phone or tablet! All your iKnow! study progress is automatically synched across devices, so you can study in the way that best matches your needs and lifestyle. “Japanese, Chinese, and English” Official courses are offered for studying Japanese, Chinese, and SAT English. The Japanese courses cover the 6,000 most commonly used words in Japanese. The Chinese courses cover the 2,000 most commonly used words in spoken Chinese and over 1,200 words commonly used in newspapers and magazines. (All Chinese courses are available in both Traditional and Simplified Chinese.) All words have sample sentences and audio. “The iKnow! Learning Engine” iKnow! presents items in a spaced rehearsal pattern optimized for efficient learning. iKnow! adapts to differences in learning speeds and item difficulty, constantly measuring memory and predicting performance across all of your items. iKnow! does this by tracking your performance and then predicting your optimal review time on an item-by-item basis. All you have to do is push the study button, and iKnow! tells you what to learn. ************** Features: - Five study modes: iKnow!, Rapid Choice, Self Check, Sentence Trainer, and Listening. - iKnow!: Master words and phrases with our patented learning algorithms. - Rapid Choice: Fast-paced quizzing and review. - Self Check: Judge yourself on what you know and how well. - Sentence Trainer: Master sentence patterns by listening and then dictating. - Listening: Listen to content on the go. You can slow down and loop any audio. - Study progress synched across supported devices.
Murray ― 英単語学習
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Murrayは、認知科学にもとづく学習法で英単語を“長期記憶”に定着させる単語アプリです。IELTS・TOEIC・英検・TOEFL・大学受験の語彙を、ひとつのアプリでまとめて対策できます。 ■ なぜ覚えられるのか — 科学的な2本柱 ・アクティブリコール:答えを見る前に自分の頭で意味を思い出す。この「思い出す負荷」が記憶を強くします。 ・分散学習(間隔反復):忘れかけた絶妙なタイミングで再出題。少ない復習回数で長く忘れません。 一語ごとに記憶の状態を管理し、その日にやるべき「新規」と「復習」を自動で組み立てます。 ■ 目標の試験を選ぶだけ CEFR・IELTS・TOEIC・TOEFL・英検・大学受験から目標を選択。レベル(バンド)に合わせて出題範囲を最適化します。学習の進み具合(記憶状態)は語ごとに共有されるので、目標を変えても積み上げは無駄になりません。 ■ 続く仕組み ・1日の学習時間(5〜45分)に合わせた無理のない出題 ・連続学習(ストリーク)、レベル、ジェム、デイリークエスト、実績バッジ ・「やりすぎない」設計:分散学習の原則にそって、その日の最適量で止めます ■ 発音つき・ていねいな例文 英国/米国・男性/女性の音声を選択可能。例文・コロケーション・類義語つきで、使える形で覚えられます。 ■ 苦手な語を狙い撃ち(弱点トレーニング) 間違えた語や、毎回手こずっている語だけを自動で集め、まとめて復習できます。覚えられた語は自動的に外れるので、いつも「いまの弱点」だけが残ります。 ■ すべての機種で同期 iPhone・iPad・Macに対応。同じApple IDなら、学習状態と購入が全機種で同期します(iCloud)。一度の購入で全機種に対応(ユニバーサル購入)。 ■ 料金 基本無料。無料プランでも、復習カードは無制限、A1・A2の新規語も上限なしで学習できます。ストリーク・XP・クエスト・実績もすべて使えます。 買い切りのPro(サブスクリプションではありません)にアップグレードすると、1日の新規単語(B1以上)の上限が解除され、弱点トレーニングも全語数まとめて実行できます。一度の購入でiPhone・iPad・Macすべてに対応します。 広告は無料・Proどちらにも一切ありません。 データについて:本アプリは個人を特定する情報を収集しません。学習データはあなたのiCloudプライベートデータベースにのみ保存されます。 ――――――――――― IELTS® は British Council、IDP: IELTS Australia、Cambridge Assessment English の登録商標です。TOEIC® は ETS の登録商標です。本アプリはこれらの団体とは一切関係がなく、提携・公認・推薦を受けたものではありません。
Screenshots
Verdict
The clearest difference is update cadence: Murray ― 英単語学習 at every 9 days against iKnow!'s every 5 weeks. iKnow!'s advantage is device support (4 vs 2) and iOS requirement (14.0 vs 17.0). On price, ads and in-app purchases 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
Both are free to download. iKnow! sells 10 one-off in-app purchases and Murray ― 英単語学習 sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
iKnow! ships an update every 5 weeks, Murray ― 英単語学習 every 9 days. The most recent releases landed on October 14, 2026 and October 10, 2026 respectively.
| Parameter | iKnow! | Murray ― 英単語学習 |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (490 ratings) — better | — |
| Positive reviews | 78.6% of reviews | — |
| Number of ratings | 490 — better | — |
| Update frequency | Every 5 weeks | Every 9 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | DMM.com LLC | interdisciplinary design lab. |
Bugs and requests
iKnow!
Reported bugs
4 issues- Crashes on startup
- Blank screens during multiple-choice questions
- Issues with typing answers and registering input
- Audio not playing for some example sentences
Requested features
7 requests- Add more languages beyond Japanese and Chinese
- Improve community course integration
- Implement a dark mode
- Add more example sentences per word
- Provide an option to learn without kanji
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- Implement a notification system for review reminders
- Add grammar drills and kanji writing practice
Murray ― 英単語学習
Not enough reviews yet to summarise bugs or requests.
In-app purchases
iKnow!
- 3 Month Plan$23.99
- 12 Month Plan$39.99
- 12+1 Month Plan$39.99
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- 6 Month Plan$47.99
- 6+1 Month Plan$47.99
- 12+3 Month Plan$54.99
- 12 Month Plan$59.99
- 12 Month Plan$64.99
- 12+1 Month Plan$64.99
- 12 Month Plan$69.99
Murray ― 英単語学習
- Murray Pro(買い切り)$11.99









