# 写点什么 vs PDF File Protector

The clearest difference is price: 写点什么 at Free against PDF File Protector's $19.99. 写点什么 also leads on update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

写点什么 is free to download; PDF File Protector costs $19.99 up front. 写点什么 sells 1 one-off in-app purchase and PDF File Protector sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

写点什么 ships an update every 3 weeks, PDF File Protector every 2 months. Both last shipped on October 24, 2026.

## The numbers

| Metric | 写点什么 | PDF File Protector |
| --- | --- | --- |
| Price | **Free** | $19.99 |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 43 MB | 7 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [勤根 周](https://appshunter.io/developer/1753847291) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## What reviewers say

### 写点什么

[App page](https://appshunter.io/ios/app/id6736580758)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 临摹功能 | $6.99 | one-time |


### PDF File Protector

[App page](https://appshunter.io/ios/app/pdf-file-protector/id6738285744)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pdf签名内购 | $9.99 | one-time |


## Frequently asked questions

### Is 写点什么 free?

写点什么 is free to download, with in-app purchases available.

### Is PDF File Protector free?

PDF File Protector costs $19.99, and also offers in-app purchases.

### Do 写点什么 or PDF File Protector have ads?

Neither 写点什么 nor PDF File Protector shows ads.

### Which is updated more often, 写点什么 or PDF File Protector?

写点什么 ships an update every 3 weeks, and PDF File Protector every 2 months. Most recently, 写点什么 was updated on October 24, 2026 and PDF File Protector on October 24, 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.*