# C31车联网 vs 联动秘书Pro

The clearest difference is update cadence: 联动秘书Pro at every 5 weeks against C31车联网's every 14 months. C31车联网's advantage is iOS requirement (8.0 vs 12.0). 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.

C31车联网 ships an update every 14 months, 联动秘书Pro every 5 weeks. The most recent releases landed on October 7, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | C31车联网 | 联动秘书Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Every 5 weeks** |
| Size | 78 MB | 19 MB |
| Requires iOS | **8.0** | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [胜 邓](https://appshunter.io/developer/1368398791) | [Umpay E-Commerce Co.,Ltd.](https://appshunter.io/developer/992711848) |

## What reviewers say

### C31车联网

[App page](https://appshunter.io/ios/app/c31/id1477855502)

**In-app purchases:** none


### 联动秘书Pro

[App page](https://appshunter.io/ios/app/pro/id1518526181)

**In-app purchases:** none


## Frequently asked questions

### Is C31车联网 free?

C31车联网 is free to download, with no in-app purchases.

### Is 联动秘书Pro free?

联动秘书Pro is free to download, with no in-app purchases.

### Do C31车联网 or 联动秘书Pro have ads?

Neither C31车联网 nor 联动秘书Pro shows ads.

### Which is updated more often, C31车联网 or 联动秘书Pro?

C31车联网 ships an update every 14 months, and 联动秘书Pro every 5 weeks. Most recently, C31车联网 was updated on October 7, 2026 and 联动秘书Pro on September 24, 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.*