# PDF转换器 vs 压缩解压大师

The clearest difference is update cadence: 压缩解压大师 at every 5 days against PDF转换器's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF转换器 sells 3 in-app purchases, starting at $3.99 per 7 days and 压缩解压大师 sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF转换器 ships an update every 2 weeks, 压缩解压大师 every 5 days. The most recent releases landed on September 10, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | PDF转换器 | 压缩解压大师 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Every 5 days** |
| Size | 34 MB | 15 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [鑫鑫 陈](https://appshunter.io/developer/1647351343) | [滟镁 杨](https://appshunter.io/developer/1681249601) |

## What reviewers say

### PDF转换器

[App page](https://appshunter.io/ios/app/pdf/id1659370888)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pdf转换器周订阅 | $3.99 | per 7 days |
| pdf转换器月订阅 | $12.99 | per month |
| pdf转换器季度订阅 | $19.99 | per 3 months |


### 压缩解压大师

[App page](https://appshunter.io/ios/app/and/id6449088213)

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解压大师周会员 | $3.99 | per 7 days |
| 解压大师月会员 | $6.99 | per month |
| 解压大师年会员 | $19.99 | per year |


## Frequently asked questions

### Is PDF转换器 free?

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

### Is 压缩解压大师 free?

压缩解压大师 is free to download, with in-app purchases available.

### Do PDF转换器 or 压缩解压大师 have ads?

Neither PDF转换器 nor 压缩解压大师 shows ads.

### Which is updated more often, PDF转换器 or 压缩解压大师?

PDF转换器 ships an update every 2 weeks, and 压缩解压大师 every 5 days. Most recently, PDF转换器 was updated on September 10, 2026 and 压缩解压大师 on May 17, 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.*