# 超注音 vs PDF快速盖章

The clearest difference is ads: PDF快速盖章 at none against 超注音's shown. 超注音's advantage is update cadence (every 6 weeks vs every 4 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

超注音 costs $4.99 and PDF快速盖章 $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

超注音 ships an update every 6 weeks, PDF快速盖章 every 4 months. The most recent releases landed on September 30, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 超注音 | PDF快速盖章 |
| --- | --- | --- |
| Price | $4.99 | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/id983145797/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 52.2% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 6 weeks** | Every 4 months |
| Monetization | — | Paid |
| Size | 116 MB | 27 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Chih Chao Yu](https://appshunter.io/developer/983145796) | [海昕 顾](https://appshunter.io/developer/606670314) |

## What reviewers say

### 超注音

[App page](https://appshunter.io/ios/app/id983145797)

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is 超注音 free?

超注音 costs $4.99, with no in-app purchases.

### Is PDF快速盖章 free?

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

### Do 超注音 or PDF快速盖章 have ads?

超注音 shows ads; PDF快速盖章 does not.

### Which is updated more often, 超注音 or PDF快速盖章?

超注音 ships an update every 6 weeks, and PDF快速盖章 every 4 months. Most recently, 超注音 was updated on September 30, 2026 and PDF快速盖章 on September 14, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*