# 氧气浏览器 vs PDF转换器

The clearest difference is in-app purchases: 氧气浏览器 at none against PDF转换器's 3. PDF转换器's advantage is update cadence (every 3 weeks vs every 3 months). On price, ads, device support and iOS requirement 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. 氧气浏览器 asks for nothing beyond the download.

氧气浏览器 ships an update every 3 months, PDF转换器 every 3 weeks. The most recent releases landed on October 3, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | 氧气浏览器 | PDF转换器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 34 MB | 17 MB |
| Requires iOS | **11.0** | 12.4 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [权 孙](https://appshunter.io/developer/1542434229) | [Shanghai Hongtai Trading Co., Ltd.](https://appshunter.io/developer/1634567281) |

## What reviewers say

### 氧气浏览器

[App page](https://appshunter.io/ios/app/id1564020941)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 氧气浏览器 free?

氧气浏览器 is free to download, with no in-app purchases.

### Is PDF转换器 free?

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

### Do 氧气浏览器 or PDF转换器 have ads?

Neither 氧气浏览器 nor PDF转换器 shows ads.

### Which is updated more often, 氧气浏览器 or PDF转换器?

氧气浏览器 ships an update every 3 months, and PDF转换器 every 3 weeks. Most recently, 氧气浏览器 was updated on October 3, 2026 and PDF转换器 on October 14, 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.*