# AI写作助手 vs 公文岛

AI写作助手 and 公文岛 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. AI写作助手 sells 11 in-app purchases, starting at $14.99 per year and 公文岛 sells 3 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 9, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | AI写作助手 | 公文岛 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (10 ratings)](https://appshunter.io/ios/app/ai-and/id6476187281/reviews)** |
| Number of ratings | — | **10** |
| Positive reviews | — | 87.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Freemium |
| Size | 64 MB | 24 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hefei Zuoan Network Technology Co., Ltd.](https://appshunter.io/developer/1560598121) | [Mge Information Technology Co.,Ltd](https://appshunter.io/developer/1593551251) |

## What reviewers say

### AI写作助手

[App page](https://appshunter.io/ios/app/ai/id6469303462)

**Features:** macOS Compatibility

**In-app purchases (11)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-year order | $14.99 | per year |
| 次数包(50次) | $0.99 | one-time |
| 次数包(10次) | $0.99 | one-time |
| 次数包(30次) | $0.99 | one-time |
| 文件解析次数(50次) | $0.99 | one-time |
| 灵感值(100个) | $5.99 | one-time |
| 灵感值(200个) | $11.99 | one-time |
| 1年会员 | $14.99 | one-time |
| 灵感值(300个) | $17.99 | one-time |
| 终身会员 | $19.99 | one-time |
| 永久会员 | $24.99 | one-time |


### 公文岛

[App page](https://appshunter.io/ios/app/ai-and/id6476187281)

This AI-powered writing tool assists with various content creation needs, from short videos and marketing copy to formal documents and daily reports. It offers features like content generation, rewriting, and a comprehensive knowledge assistant to spark creativity and boost efficiency.

**Highlights:** AI-powered content generation, Text rewriting and paraphrasing, Formal document and report templates, Knowledge assistant for queries, Article expansion and continuation, Text summarization and extraction

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月会员 | $6.99 | per month |
| 年会员 | $14.99 | per year |
| 永久会员 | $24.99 | one-time |


## Frequently asked questions

### Is AI写作助手 free?

AI写作助手 is free to download, with in-app purchases available.

### Is 公文岛 free?

公文岛 is free to download, with in-app purchases available.

### Do AI写作助手 or 公文岛 have ads?

Neither AI写作助手 nor 公文岛 shows ads.

### Which is updated more often, AI写作助手 or 公文岛?

AI写作助手 ships an update every 3 weeks, and 公文岛 every 3 weeks. Most recently, AI写作助手 was updated on September 9, 2026 and 公文岛 on September 7, 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.*