iKnow! vs HelloReader!
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.
HelloReader!
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HelloReader 是一款专为小说爱好者打造的极简纯净阅读器,摒弃一切弹窗与插页广告,专注内容,让你沉浸在故事中。 主题模式:支持日间/夜间自动切换,护眼又舒适; 章节翻动:屏幕左右滑动进入上一章或下一章; 字体调节:自由调节字体大小,满足不同阅读习惯; 书籍管理:添加、删除书籍,随时恢复上次阅读位置; 多源导入:支持从 飘天等常见小说网站智能导入; 朗读服务:点击文本开启微软中文语音,免费使用,多种语音可选; 背景运行:支持手机关闭模式下语音持续播放; 离线阅读:访问过的章节自动存储,同步
Screenshots
Verdict
The clearest difference is in-app purchases: HelloReader! at none against iKnow!'s 10. iKnow!'s advantage is device support (4 vs 2) and iOS requirement (14.0 vs 17.6). On price, update cadence and ads 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. HelloReader! asks for nothing beyond the download.
iKnow! ships an update every 5 weeks, HelloReader! every 3 weeks. The most recent releases landed on October 10, 2026 and September 30, 2026 respectively.
| Parameter | iKnow! | HelloReader! |
|---|---|---|
| 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 3 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 14.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 19 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | DMM.com LLC | Dong Liang |
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
HelloReader!
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
HelloReader!
No in-app purchases









