# 星卡TD vs Zlen 扫描

The clearest difference is update cadence: 星卡TD at every 5 weeks against Zlen 扫描's every 5 months. 星卡TD also leads on iOS requirement (9.0 vs 17.0). 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.

星卡TD ships an update every 5 weeks, Zlen 扫描 every 5 months. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | 星卡TD | Zlen 扫描 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Size | 260 MB | 45 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 9+ |
| Developer | [THINKCAR INC](https://appshunter.io/developer/1464847379) | [Haifeng Zhao](https://appshunter.io/developer/1894176651) |

## What reviewers say

### 星卡TD

[App page](https://appshunter.io/ios/app/td/id1514554756)

**Features:** macOS Compatibility

**In-app purchases:** none


### Zlen 扫描

[App page](https://appshunter.io/ios/app/zlen/id6763501853)

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

**In-app purchases:** none


## Frequently asked questions

### Is 星卡TD free?

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

### Is Zlen 扫描 free?

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

### Do 星卡TD or Zlen 扫描 have ads?

Neither 星卡TD nor Zlen 扫描 shows ads.

### Which is updated more often, 星卡TD or Zlen 扫描?

星卡TD ships an update every 5 weeks, and Zlen 扫描 every 5 months. Most recently, 星卡TD was updated on October 14, 2026 and Zlen 扫描 on October 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.*