# PDF转换器 vs 锤爆压力

The clearest difference is iOS requirement: PDF转换器 at 12.4 against 锤爆压力's 15.6. On price, update cadence, ads and in-app purchases 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 and 锤爆压力 sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

PDF转换器 ships an update every 3 weeks, 锤爆压力 every 6 weeks. The most recent releases landed on October 27, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | PDF转换器 | 锤爆压力 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 weeks |
| Size | 17 MB | 1 MB |
| Requires iOS | **12.4** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Shanghai Hongtai Trading Co., Ltd.](https://appshunter.io/developer/1634567281) | [杨柳 孙](https://appshunter.io/developer/1878331190) |

## 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 |


### 锤爆压力

[App page](https://appshunter.io/ios/app/id6761704125)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 小赏一下 - 发芽啦 | $0.99 | one-time |
| 中赏一波 - 要发啦 | $0.99 | one-time |
| 大赏一记 - 发大财了 | $12.99 | one-time |


## Frequently asked questions

### Is PDF转换器 free?

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

### Is 锤爆压力 free?

锤爆压力 is free to download, with in-app purchases available.

### Do PDF转换器 or 锤爆压力 have ads?

Neither PDF转换器 nor 锤爆压力 shows ads.

### Which is updated more often, PDF转换器 or 锤爆压力?

PDF转换器 ships an update every 3 weeks, and 锤爆压力 every 6 weeks. Most recently, PDF转换器 was updated on October 27, 2026 and 锤爆压力 on October 28, 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.*