# PDF快速盖章 vs 天天爆款

The clearest difference is price: 天天爆款 at Free against PDF快速盖章's $4.99. 天天爆款 also leads on update cadence (every 10 days vs every 4 months) and iOS requirement (14.0 vs 17.6). PDF快速盖章's advantage is in-app purchases (none vs 7). On ads and device support there is nothing between them.

天天爆款 is free to download; PDF快速盖章 costs $4.99 up front. 天天爆款 sells 7 in-app purchases, starting at $9.99 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, 天天爆款 every 10 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | PDF快速盖章 | 天天爆款 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 10 days** |
| Monetization | Paid | — |
| Size | 27 MB | 128 MB |
| Requires iOS | 17.6 | **14.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [海昕 顾](https://appshunter.io/developer/606670314) | [新民 吴](https://appshunter.io/developer/1760039433) |

## 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


### 天天爆款

[App page](https://appshunter.io/ios/app/ai/id6757380214)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员 | $9.99 | per 7 days |
| 月会员 | $14.99 | per month |
| 300积分 | $6.99 | one-time |
| 800积分 | $14.99 | one-time |
| 2000积分 | $29.99 | one-time |
| 永久会员 | $39.99 | one-time |
| 4000积分 | $39.99 | 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 天天爆款 free?

天天爆款 is free to download, with in-app purchases available.

### Do PDF快速盖章 or 天天爆款 have ads?

Neither PDF快速盖章 nor 天天爆款 shows ads.

### Which is updated more often, PDF快速盖章 or 天天爆款?

PDF快速盖章 ships an update every 4 months, and 天天爆款 every 10 days. Most recently, PDF快速盖章 was updated on October 2, 2026 and 天天爆款 on October 9, 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.*