# 中国联通 vs 51DK

The clearest difference is rating: 51DK at 5.0 against 中国联通's 2.5. 中国联通's advantage is ratings volume (1.3K vs 1) and iOS requirement (13.0 vs 15.0). On price, update cadence, ads and in-app purchases there is nothing between them.

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

51DK holds the better App Store score, 5.0 against 2.5. That said, the two scores are not equally well evidenced: 中国联通 has 1.3K ratings behind it against 1, so its average is the more settled of the two.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 21, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 中国联通 | 51DK |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.5 (1.3K ratings)](https://appshunter.io/ios/app/id416457422/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/51dk/id1595016316/reviews)** |
| Number of ratings | **1.3K** | 1 |
| Positive reviews | 37.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | — | Free |
| Size | 333 MB | 59 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [China United Network Communications Corporation Limited](https://appshunter.io/developer/674392285) | [深圳市卓联启航科技有限公司](https://appshunter.io/developer/1266211236) |

## What reviewers say

### 中国联通

[App page](https://appshunter.io/ios/app/id416457422)

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Convenient app
- 🚀 Fast and responsive
- 💡 Comprehensive functionality

**What reviewers complain about**

- 🐛 Frequent crashes
- 🔋 High battery consumption
- 📢 Too many ads and promotions
- 🤯 Confusing and cluttered UI
- 🔒 Privacy concerns

**Reported bugs**

- Login issues and authentication problems
- Compatibility problems with newer OS versions
- Inconsistent performance across devices

**Requested features**

- Add English language support
- Improve search and navigation
- Provide more detailed account information
- Implement dark mode option


### 51DK

[App page](https://appshunter.io/ios/app/51dk/id1595016316)

This utility app uses Bluetooth to connect to your vehicle, allowing you to unlock, lock, and open the trunk directly from your phone. It eliminates the need to carry physical keys for these functions.

**Highlights:** Bluetooth vehicle connectivity, Remote car unlocking, Remote car locking, Remote trunk opening, Eliminates physical keys

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

**In-app purchases:** none


## Frequently asked questions

### Is 中国联通 free?

中国联通 is free to download, with no in-app purchases.

### Is 51DK free?

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

### Which has better reviews, 中国联通 or 51DK?

51DK is rated higher. 中国联通 averages 2.5 out of 5 from 1.3K ratings, while 51DK averages 5.0 from 1 ratings.

### Do 中国联通 or 51DK have ads?

Neither 中国联通 nor 51DK shows ads.

### Which is updated more often, 中国联通 or 51DK?

中国联通 ships an update every 3 weeks, and 51DK every 3 weeks. Most recently, 中国联通 was updated on October 21, 2026 and 51DK on October 10, 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.*