# Siyou B2B vs yunlian

The clearest difference is update cadence: Siyou B2B at every 2 weeks against yunlian's every 9 months. Siyou B2B also leads on device support. yunlian's advantage is iOS requirement (11.0 vs 15.0). On price 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.

Siyou B2B ships an update every 2 weeks, yunlian every 9 months. The most recent releases landed on October 29, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Siyou B2B | yunlian |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 2 weeks** | Every 9 months |
| Size | 58 MB | 228 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [SIYOU TECHNOLOGY S.R.L](https://appshunter.io/developer/1466639725) | [Guo Xu](https://appshunter.io/developer/1755127001) |

## What reviewers say

### Siyou B2B

[App page](https://appshunter.io/ios/app/siyou-b2b/id1482752003)

**Features:** Apple Wallet, Vision Pro support

**In-app purchases:** none


### yunlian

[App page](https://appshunter.io/ios/app/yunlian/id6505098547)

**In-app purchases:** none


## Frequently asked questions

### Is Siyou B2B free?

Siyou B2B is free to download, with no in-app purchases.

### Is yunlian free?

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

### Which is updated more often, Siyou B2B or yunlian?

Siyou B2B ships an update every 2 weeks, and yunlian every 9 months. Most recently, Siyou B2B was updated on October 29, 2026 and yunlian on October 2, 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.*