# AI Chat小助手 vs pdf转换器

AI Chat小助手 and pdf转换器 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 Chat小助手 sells 4 in-app purchases, starting at $4.99 per 7 days and pdf转换器 sells 2 in-app purchases, starting at $4.99 per 7 days. Whichever you choose, the download price is not the number that matters.

AI Chat小助手 ships an update every 5 weeks, pdf转换器 every 4 weeks. The most recent releases landed on September 17, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | AI Chat小助手 | pdf转换器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 4 weeks** |
| Size | 21 MB | 20 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 17+ |
| Developer | [广志 李](https://appshunter.io/developer/1689223989) | [文 罗](https://appshunter.io/developer/1709424450) |

## What reviewers say

### AI Chat小助手

[App page](https://appshunter.io/ios/app/ai-chat-chatbot/id6451243460)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级会员周订阅 | $4.99 | per 7 days |
| 高级会员月订阅 | $9.99 | per month |
| 高级会员季订阅 | $14.99 | per 3 months |
| 高级会员年订阅 | $29.99 | per year |


### pdf转换器

[App page](https://appshunter.io/ios/app/pdf/id6472162112)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $4.99 | per 7 days |
| 月会员 | $12.99 | per month |


## Frequently asked questions

### Is AI Chat小助手 free?

AI Chat小助手 is free to download, with in-app purchases available.

### Is pdf转换器 free?

pdf转换器 is free to download, with in-app purchases available.

### Do AI Chat小助手 or pdf转换器 have ads?

Neither AI Chat小助手 nor pdf转换器 shows ads.

### Which is updated more often, AI Chat小助手 or pdf转换器?

AI Chat小助手 ships an update every 5 weeks, and pdf转换器 every 4 weeks. Most recently, AI Chat小助手 was updated on September 17, 2026 and pdf转换器 on September 22, 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.*