# iKnow! vs HelloReader!

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.

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.

## The numbers

| Metric | iKnow! | HelloReader! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (490 ratings)](https://appshunter.io/ios/app/iknow/id417713473/reviews)** | — |
| Number of ratings | **490** | — |
| Positive reviews | 78.6% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 4 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DMM.com LLC](https://appshunter.io/developer/373765747) | [Dong Liang](https://appshunter.io/developer/1810380860) |

## What reviewers say

### iKnow!

[App page](https://appshunter.io/ios/app/iknow/id417713473)

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.

**Highlights:** Adaptive learning engine, Spaced rehearsal pattern, Five study modes, Vocabulary and sentence mastery, Progress synchronization, Audio playback with speed control

**Features:** iMessage stickers, Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3 Month Plan | $23.99 | one-time |
| 12 Month Plan | $39.99 | one-time |
| 12+1 Month Plan | $39.99 | one-time |
| 6 Month Plan | $47.99 | one-time |
| 6+1 Month Plan | $47.99 | one-time |
| 12+3 Month Plan | $54.99 | one-time |
| 12 Month Plan | $59.99 | one-time |
| 12 Month Plan | $64.99 | one-time |
| 12+1 Month Plan | $64.99 | one-time |
| 12 Month Plan | $69.99 | one-time |

**What reviewers like**

- 🚀 Excellent for vocabulary learning
- 👍 Great for learning Japanese and Chinese
- 👍 Effective spaced repetition system
- 👍 Useful example sentences and audio
- 👍 Convenient for studying on the go

**What reviewers complain about**

- 🐛 Stability issues with recent updates
- 🐛 Crashes and freezes reported
- 🐛 Audio playback problems
- 🔒 Subscription-based model
- 👎 Limited customization options

**Reported bugs**

- 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**

- 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


### HelloReader!

[App page](https://appshunter.io/ios/app/helloreader/id6745104692)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iKnow! free?

iKnow! is free to download, with in-app purchases available.

### Is HelloReader! free?

HelloReader! is free to download, with no in-app purchases.

### Do iKnow! or HelloReader! have ads?

Neither iKnow! nor HelloReader! shows ads.

### Which is updated more often, iKnow! or HelloReader!?

iKnow! ships an update every 5 weeks, and HelloReader! every 3 weeks. Most recently, iKnow! was updated on October 10, 2026 and HelloReader! on September 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*