# PDF Converter vs 盖章

The clearest difference is update cadence: 盖章 at weekly against PDF Converter's every 3 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. PDF Converter sells 2 in-app purchases, starting at $2.99 per month and 盖章 sells 2 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

PDF Converter ships an update every 3 weeks, 盖章 weekly. The most recent releases landed on October 21, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | PDF Converter | 盖章 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Monetization | — | Free with in-app purchases |
| Size | 30 MB | 7 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod, Mac | iPhone, iPad, iPod, Mac |
| Age rating | 4+ | 4+ |
| Developer | [XIAOYUN.TECH](https://appshunter.io/developer/1575836630) | [Hangzhou Niufen Network Technology Co., Ltd.](https://appshunter.io/developer/1896746554) |

## What reviewers say

### PDF Converter

[App page](https://appshunter.io/ios/app/pdf-converter-file-tools/id6752560738)

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月订阅 | $2.99 | per month |
| 年会员 | $9.99 | one-time |


### 盖章

[App page](https://appshunter.io/ios/app/e-stamp/id6775122604)

Easily add stamps and handwritten electronic signatures to PDF documents. Process contracts and agreements efficiently without printing or scanning, keeping your data secure locally on your device.

**Highlights:** Smart PDF stamping, Across-page seal generation, Handwritten electronic signatures, Batch stamping and signing, Local data processing, Seamless document import/export

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| E‑Stamp Service | $2.99 | per month |
| 无纸盖章永久版 | $9.99 | one-time |


## Frequently asked questions

### Is PDF Converter free?

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

### Is 盖章 free?

盖章 is free to download, with in-app purchases available.

### Do PDF Converter or 盖章 have ads?

Neither PDF Converter nor 盖章 shows ads.

### Which is updated more often, PDF Converter or 盖章?

PDF Converter ships an update every 3 weeks, and 盖章 weekly. Most recently, PDF Converter was updated on October 21, 2026 and 盖章 on October 13, 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.*