# SmartZDOBD vs DTC

The clearest difference is update cadence: SmartZDOBD at every 2 weeks against DTC's every 5 weeks. SmartZDOBD also leads on iOS requirement (12.0 vs 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.

SmartZDOBD ships an update every 2 weeks, DTC every 5 weeks. The most recent releases landed on October 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SmartZDOBD | DTC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 5 weeks |
| Size | 38 MB | 46 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) | [Shenzhen Huansheng Intelligent Co., Ltd](https://appshunter.io/developer/6809382351) |

## What reviewers say

### SmartZDOBD

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

**Features:** macOS Compatibility

**In-app purchases:** none


### DTC

[App page](https://appshunter.io/ios/app/dtc-tool/id6809382349)

**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 DTC free?

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

### Do SmartZDOBD or DTC have ads?

Neither SmartZDOBD nor DTC shows ads.

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

SmartZDOBD ships an update every 2 weeks, and DTC every 5 weeks. Most recently, SmartZDOBD was updated on October 6, 2026 and DTC on October 31, 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.*