# PDF快速盖章 vs 签章助手

The clearest difference is price: 签章助手 at Free against PDF快速盖章's $4.99. 签章助手 also leads on update cadence (monthly vs every 4 months). PDF快速盖章's advantage is in-app purchases (none vs 3). On ads, device support and iOS requirement there is nothing between them.

签章助手 is free to download; PDF快速盖章 costs $4.99 up front. 签章助手 sells 3 in-app purchases, starting at $3.99 per 7 days. PDF快速盖章 asks for nothing beyond the download.

PDF快速盖章 ships an update every 4 months, 签章助手 monthly. The most recent releases landed on September 1, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | PDF快速盖章 | 签章助手 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 27 MB | 78 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [海昕 顾](https://appshunter.io/developer/606670314) | [家芳 陶](https://appshunter.io/developer/1891660721) |

## What reviewers say

### PDF快速盖章

[App page](https://appshunter.io/ios/app/pdf/id6756157531)

This app allows for quick and easy stamping of PDF documents and images. It supports batch processing for multi-page PDFs, offers a comprehensive stamp library with customization options, and simulates realistic stamp effects. It's designed for efficient mobile document signing and processing.

**Highlights:** Quick stamping for PDFs and images, Batch processing for multi-page PDFs, Customizable stamp library, Realistic stamp effects with aging, Precise stamp adjustment, One-click common stamp setup, Direct opening from external apps

**Features:** macOS Compatibility

**In-app purchases:** none


### 签章助手

[App page](https://appshunter.io/ios/app/pdf/id6762083508)

This tool allows users to easily add stamps and signatures to PDF documents. It supports various stamp types, including contract and cross-page seals, and allows for flexible placement and resizing. Once applied, stamps and signatures are permanently embedded into the PDF for secure sharing and archiving.

**Highlights:** Add stamps and signatures to PDFs, Supports contract and cross-page seals, Drag, rotate, and resize elements, Multi-page document processing, Embeds stamps/signatures into exported PDFs, Local storage for security

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 7-day VIP (unlock all) | $3.99 | per 7 days |
| 7days | $3.99 | one-time |
| lifetime | $19.99 | one-time |


## Frequently asked questions

### Is PDF快速盖章 free?

PDF快速盖章 costs $4.99, with no in-app purchases.

### Is 签章助手 free?

签章助手 is free to download, with in-app purchases available.

### Do PDF快速盖章 or 签章助手 have ads?

Neither PDF快速盖章 nor 签章助手 shows ads.

### Which is updated more often, PDF快速盖章 or 签章助手?

PDF快速盖章 ships an update every 4 months, and 签章助手 monthly. Most recently, PDF快速盖章 was updated on September 1, 2026 and 签章助手 on September 3, 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.*