# 钢筋大师 vs 永成智能

The clearest difference is in-app purchases: 永成智能 at none against 钢筋大师's 2. 钢筋大师's advantage is iOS requirement (9.0 vs 11.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 钢筋大师 sells 2 one-off in-app purchases. 永成智能 asks for nothing beyond the download.

钢筋大师 ships an update every 4 months, 永成智能 every 2 months. The most recent releases landed on October 9, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | 钢筋大师 | 永成智能 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Size | 153 MB | 47 MB |
| Requires iOS | **9.0** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [颖达 陈](https://appshunter.io/developer/1058507663) | [苏州汇川技术有限公司](https://appshunter.io/developer/1441943965) |

## What reviewers say

### 钢筋大师

[App page](https://appshunter.io/ios/app/id1312900623)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级功能购买 | $3.99 | one-time |
| 解锁全版本 | $5.99 | one-time |


### 永成智能

[App page](https://appshunter.io/ios/app/id6447233606)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 钢筋大师 free?

钢筋大师 is free to download, with in-app purchases available.

### Is 永成智能 free?

永成智能 is free to download, with no in-app purchases.

### Do 钢筋大师 or 永成智能 have ads?

Neither 钢筋大师 nor 永成智能 shows ads.

### Which is updated more often, 钢筋大师 or 永成智能?

钢筋大师 ships an update every 4 months, and 永成智能 every 2 months. Most recently, 钢筋大师 was updated on October 9, 2026 and 永成智能 on October 6, 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.*