# PDF转换器 vs PDF Shrink

The clearest difference is in-app purchases: PDF Shrink at none against PDF转换器's 3. PDF转换器's advantage is device support (3 vs 1) and iOS requirement (12.4 vs 17.0). On price, update cadence and ads there is nothing between them.

Both are free to download. PDF转换器 sells 3 in-app purchases, starting at $2.99 per month. PDF Shrink asks for nothing beyond the download.

PDF转换器 ships an update every 3 weeks, PDF Shrink every 2 weeks. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | PDF转换器 | PDF Shrink |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 17 MB | 1 MB |
| Requires iOS | **12.4** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shanghai Hongtai Trading Co., Ltd.](https://appshunter.io/developer/1634567281) | [宏华 胡](https://appshunter.io/developer/1868280133) |

## What reviewers say

### PDF转换器

[App page](https://appshunter.io/ios/app/pdf-pdf/id6469493796)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PDF转换器-各种文档格式互转月会员 | $2.99 | per month |
| PDF转换器-各种文档格式互转年会员 | $24.99 | per year |
| PDF转换器-各种文档格式互转永久会员 | $39.99 | one-time |


### PDF Shrink

[App page](https://appshunter.io/ios/app/pdf-shrink-offline-compress/id6782493416)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF转换器 free?

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

### Is PDF Shrink free?

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

### Do PDF转换器 or PDF Shrink have ads?

Neither PDF转换器 nor PDF Shrink shows ads.

### Which is updated more often, PDF转换器 or PDF Shrink?

PDF转换器 ships an update every 3 weeks, and PDF Shrink every 2 weeks. Most recently, PDF转换器 was updated on October 27, 2026 and PDF Shrink on October 25, 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.*