# Quantum Messages vs PDF转换编辑

The clearest difference is in-app purchases: PDF转换编辑 at none against Quantum Messages's 1. PDF转换编辑 also leads on iOS requirement (12.0 vs 17.0). Quantum Messages's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Quantum Messages sells 1 one-off in-app purchase. PDF转换编辑 asks for nothing beyond the download.

## The numbers

| Metric | Quantum Messages | PDF转换编辑 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | — | Every 6 weeks |
| Size | 2 MB | 97 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [嘉胜 陈](https://appshunter.io/developer/1508884749) | [广州市企云信息技术有限公司](https://appshunter.io/developer/1869306960) |

## What reviewers say

### Quantum Messages

[App page](https://appshunter.io/ios/app/quantum-messages/id6747940707)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $19.99 | one-time |


### PDF转换编辑

[App page](https://appshunter.io/ios/app/pdf/id6758146087)

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

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Messages free?

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

### Is PDF转换编辑 free?

PDF转换编辑 is free to download, with no in-app purchases.

### Do Quantum Messages or PDF转换编辑 have ads?

PDF转换编辑 shows ads; Quantum Messages does not.

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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.*