# ChatPal vs 英語日記 Niki

The clearest difference is in-app purchases: ChatPal at none against 英語日記 Niki's 4. ChatPal also leads on iOS requirement (15.1 vs 18.5). 英語日記 Niki's advantage is ads (none vs shown). On price, update cadence and device support there is nothing between them.

Both are free to download. 英語日記 Niki sells 4 in-app purchases, starting at $5.99 per month. ChatPal asks for nothing beyond the download.

ChatPal ships an update every 3 days, 英語日記 Niki every 4 days. The most recent releases landed on November 11, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | ChatPal | 英語日記 Niki |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | — | Freemium |
| Size | 31 MB | 24 MB |
| Requires iOS | **15.1** | 18.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Hironori Hara](https://appshunter.io/developer/1772280685) | [Cliffkentaro Shimada](https://appshunter.io/developer/1873912572) |

## What reviewers say

### ChatPal

[App page](https://appshunter.io/ios/app/chatpal/id6753738581)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 英語日記 Niki

[App page](https://appshunter.io/ios/app/niki-ai/id6758602521)

This app helps you improve your English writing skills by turning your daily diary entries into personalized learning materials. It uses AI to provide feedback on your writing, offering corrections, explanations, and suggestions for more natural expressions. You can practice speaking, reading, and listening based on your own content.

**Highlights:** AI-powered English writing feedback, Personalized practice exercises, Diary entries as learning material, Simple and intuitive interface, Track vocabulary usage, Monthly learning highlights

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Niki プレミアム (1ヶ月間) | $5.99 | per month |
| Niki プレミアム (1年間) | $59.99 | per year |
| Support Coffee – Regular | $0.99 | one-time |
| Support Coffee – Large | $1.99 | one-time |


## Frequently asked questions

### Is ChatPal free?

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

### Is 英語日記 Niki free?

英語日記 Niki is free to download, with in-app purchases available.

### Do ChatPal or 英語日記 Niki have ads?

ChatPal shows ads; 英語日記 Niki does not.

### Which is updated more often, ChatPal or 英語日記 Niki?

ChatPal ships an update every 3 days, and 英語日記 Niki every 4 days. Most recently, ChatPal was updated on November 11, 2026 and 英語日記 Niki on November 9, 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.*