# 结构设计工具箱 vs MarsChat

The clearest difference is device support: 结构设计工具箱 at 2 against MarsChat's —. MarsChat's advantage is iOS requirement (11.0 vs 17.6). On price and in-app purchases there is nothing between them.

Both are free to download. 结构设计工具箱 sells 3 in-app purchases, starting at $3.99 per month and MarsChat sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | 结构设计工具箱 | MarsChat |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | — |
| Update frequency | Every 4 months | — |
| Size | 14 MB | 42 MB |
| Requires iOS | 17.6 | **11.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [疆 边](https://appshunter.io/developer/1124320934) | [垚楠 卜](https://appshunter.io/developer/1691676109) |

## What reviewers say

### 结构设计工具箱

[App page](https://appshunter.io/ios/app/id1170765643)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一个月 | $3.99 | per month |
| 一年 | $7.99 | per year |
| 完整版 | $12.99 | one-time |


### MarsChat

[App page](https://appshunter.io/ios/app/marschat/id6450033150)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 火星Chat 会员使用权一个月 | $2.99 | one-time |
| 火星Chat 会员使用权3个月 | $6.99 | one-time |
| 火星Chat 会员使用权12个月 | $24.99 | one-time |


## Frequently asked questions

### Is 结构设计工具箱 free?

结构设计工具箱 is free to download, with in-app purchases available.

### Is MarsChat free?

MarsChat is free to download, with in-app purchases available.

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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.*