# 结构设计工具箱 vs Recursion

The clearest difference is in-app purchases: Recursion at none against 结构设计工具箱's 3. Recursion also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). On price and device support 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. Recursion asks for nothing beyond the download.

结构设计工具箱 ships an update every 4 months, Recursion every 3 weeks. The most recent releases landed on October 15, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | 结构设计工具箱 | Recursion |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 57.1% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 14 MB | 35 MB |
| Requires iOS | 17.6 | **9.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [疆 边](https://appshunter.io/developer/1124320934) | [少鹏 李](https://appshunter.io/developer/1631826684) |

## 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 |


### Recursion

[App page](https://appshunter.io/ios/app/recursion/id6443852888)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## 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 Recursion free?

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

### Do 结构设计工具箱 or Recursion have ads?

结构设计工具箱 shows ads; Recursion does not.

### Which is updated more often, 结构设计工具箱 or Recursion?

结构设计工具箱 ships an update every 4 months, and Recursion every 3 weeks. Most recently, 结构设计工具箱 was updated on October 15, 2026 and Recursion on October 4, 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.*