# A4妙排 vs PDF合并拆分助手

The clearest difference is ads: A4妙排 at none against PDF合并拆分助手's shown. A4妙排 also leads on update cadence (daily vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

A4妙排 ships an update daily, PDF合并拆分助手 every 6 weeks. The most recent releases landed on September 26, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | A4妙排 | PDF合并拆分助手 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | **Daily** | Every 6 weeks |
| Size | 55 MB | 78 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [一鸣 刘](https://appshunter.io/developer/1786386100) | [Qun Cao](https://appshunter.io/developer/1655069600) |

## What reviewers say

### A4妙排

[App page](https://appshunter.io/ios/app/a4-a3a4pdf/id6745166406)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF合并拆分助手

[App page](https://appshunter.io/ios/app/pdf-pdf/id6770174946)

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

**In-app purchases:** none


## Frequently asked questions

### Is A4妙排 free?

A4妙排 is free to download, with no in-app purchases.

### Is PDF合并拆分助手 free?

PDF合并拆分助手 is free to download, with no in-app purchases.

### Do A4妙排 or PDF合并拆分助手 have ads?

PDF合并拆分助手 shows ads; A4妙排 does not.

### Which is updated more often, A4妙排 or PDF合并拆分助手?

A4妙排 ships an update daily, and PDF合并拆分助手 every 6 weeks. Most recently, A4妙排 was updated on September 26, 2026 and PDF合并拆分助手 on September 19, 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.*