# 51车联 vs TCZN

The clearest difference is update cadence: 51车联 at every 4 weeks against TCZN's every 4 months. TCZN's advantage is 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.

51车联 ships an update every 4 weeks, TCZN every 4 months. Both last shipped on October 29, 2026.

## The numbers

| Metric | 51车联 | TCZN |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 weeks** | Every 4 months |
| Size | 74 MB | 54 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [深圳市卓联启航科技有限公司](https://appshunter.io/developer/1266211236) | [Shenzhen Zhongxinyou M2M Technology Co., Ltd.](https://appshunter.io/developer/1489982535) |

## What reviewers say

### 51车联

[App page](https://appshunter.io/ios/app/51/id1266212518)

**Features:** Vision Pro support

**In-app purchases:** none


### TCZN

[App page](https://appshunter.io/ios/app/tczn/id1475116742)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 51车联 free?

51车联 is free to download, with no in-app purchases.

### Is TCZN free?

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

### Do 51车联 or TCZN have ads?

Neither 51车联 nor TCZN shows ads.

### Which is updated more often, 51车联 or TCZN?

51车联 ships an update every 4 weeks, and TCZN every 4 months. Most recently, 51车联 was updated on October 29, 2026 and TCZN on October 29, 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.*