# SmartZDOBD vs 闲一

The clearest difference is update cadence: SmartZDOBD at every 2 weeks against 闲一's every 4 months. 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.

SmartZDOBD ships an update every 2 weeks, 闲一 every 4 months. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SmartZDOBD | 闲一 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 4 months |
| Size | 38 MB | 107 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [深圳市正德友邦科技有限公司](https://appshunter.io/developer/1691030696) | [Shenzhen Baisiyi Technology Co., Ltd.](https://appshunter.io/developer/1625094370) |

## What reviewers say

### SmartZDOBD

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

**Features:** macOS Compatibility

**In-app purchases:** none


### 闲一

[App page](https://appshunter.io/ios/app/id6758687874)

**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 闲一 free?

闲一 is free to download, with no in-app purchases.

### Do SmartZDOBD or 闲一 have ads?

Neither SmartZDOBD nor 闲一 shows ads.

### Which is updated more often, SmartZDOBD or 闲一?

SmartZDOBD ships an update every 2 weeks, and 闲一 every 4 months. Most recently, SmartZDOBD was updated on October 6, 2026 and 闲一 on October 7, 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.*