# Schulte Grid vs 注意力四维训练

The clearest difference is device support: Schulte Grid at 2 against 注意力四维训练's —. 注意力四维训练's advantage is iOS requirement (12.0 vs 16.0). On price and in-app purchases there is nothing between them.

Both are free to download. Schulte Grid sells 1 one-off in-app purchase and 注意力四维训练 sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Schulte Grid | 注意力四维训练 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | Yes | — |
| Update frequency | Every 5 weeks | — |
| Size | 6 MB | 22 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | **iPhone, iPad** | — |
| Age rating | 4+ | 4+ |
| Developer | [景珂 陈](https://appshunter.io/developer/620312170) | [晓华 崔](https://appshunter.io/developer/1497841751) |

## What reviewers say

### Schulte Grid

[App page](https://appshunter.io/ios/app/schulte-grid-focus-training/id777206931)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $1.99 | one-time |


### 注意力四维训练

[App page](https://appshunter.io/ios/app/id1497842313)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月付vip | $0.99 | per month |
| 年卡vip | $6.99 | per year |
| 永久vip权限 | $3.99 | one-time |


## Frequently asked questions

### Is Schulte Grid free?

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

### Is 注意力四维训练 free?

注意力四维训练 is free to download, with in-app purchases available.

---

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