# 海川云 vs 四建智造

The clearest difference is update cadence: 四建智造 at every 3 weeks against 海川云's every 3 months. 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.

海川云 ships an update every 3 months, 四建智造 every 3 weeks. The most recent releases landed on October 11, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | 海川云 | 四建智造 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Size | 159 MB | 64 MB |
| Requires iOS | 11.0 | 11.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Changsha Haichuan Automation Co., Ltd.](https://appshunter.io/developer/1146351939) | [Shanghai Construction No.4 (Group) Co., Ltd.](https://appshunter.io/developer/1604686156) |

## What reviewers say

### 海川云

[App page](https://appshunter.io/ios/app/id1146351940)

**In-app purchases:** none


### 四建智造

[App page](https://appshunter.io/ios/app/id1604686154)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 海川云 free?

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

### Is 四建智造 free?

四建智造 is free to download, with no in-app purchases.

### Do 海川云 or 四建智造 have ads?

Neither 海川云 nor 四建智造 shows ads.

### Which is updated more often, 海川云 or 四建智造?

海川云 ships an update every 3 months, and 四建智造 every 3 weeks. Most recently, 海川云 was updated on October 11, 2026 and 四建智造 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.*