# SmartZDOBD vs PDF全能阅读器

The clearest difference is iOS requirement: SmartZDOBD at 12.0 against PDF全能阅读器's 15.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | SmartZDOBD | PDF全能阅读器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Size | 38 MB | 24 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [深圳市正德友邦科技有限公司](https://appshunter.io/developer/1691030696) | [长沙飞启源网络科技有限公司](https://appshunter.io/developer/1880614058) |

## What reviewers say

### SmartZDOBD

[App page](https://appshunter.io/ios/app/smartzdobd/id6746559817)

**Features:** macOS Compatibility

**In-app purchases:** none


### PDF全能阅读器

[App page](https://appshunter.io/ios/app/pdf/id6760178536)

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

**In-app purchases:** none


## Frequently asked questions

### Is SmartZDOBD free?

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

### Is PDF全能阅读器 free?

PDF全能阅读器 is free to download, with no in-app purchases.

### Do SmartZDOBD or PDF全能阅读器 have ads?

Neither SmartZDOBD nor PDF全能阅读器 shows ads.

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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.*