# 结构大师 vs i花椒

The clearest difference is in-app purchases: i花椒 at none against 结构大师's 4. 结构大师's advantage is update cadence (every 2 months vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. 结构大师 sells 4 one-off in-app purchases. i花椒 asks for nothing beyond the download.

结构大师 ships an update every 2 months, i花椒 every 6 months. Both last shipped on October 26, 2026.

## The numbers

| Metric | 结构大师 | i花椒 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 6 months |
| Size | 100 MB | 188 MB |
| Requires iOS | 9.0 | 9.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 12+ |
| Developer | [颖达 陈](https://appshunter.io/developer/1058507663) | [华东交通大学](https://appshunter.io/developer/1070814938) |

## What reviewers say

### 结构大师

[App page](https://appshunter.io/ios/app/id1058507664)

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 高级功能购买 | $3.99 | one-time |
| 解锁当前版本SM | $19.99 | one-time |
| 打赏 | $24.99 | one-time |
| 解锁全版本 | $24.99 | one-time |


### i花椒

[App page](https://appshunter.io/ios/app/i/id1181352992)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 结构大师 free?

结构大师 is free to download, with in-app purchases available.

### Is i花椒 free?

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

### Do 结构大师 or i花椒 have ads?

Neither 结构大师 nor i花椒 shows ads.

### Which is updated more often, 结构大师 or i花椒?

结构大师 ships an update every 2 months, and i花椒 every 6 months. Most recently, 结构大师 was updated on October 26, 2026 and i花椒 on October 26, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*