# 橡皮错题 vs MathBoard

The clearest difference is in-app purchases: 橡皮错题 at none against MathBoard's 3. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. MathBoard sells 3 in-app purchases, starting at $2.99 per month. 橡皮错题 asks for nothing beyond the download.

## The numbers

| Metric | 橡皮错题 | MathBoard |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | — |
| Size | 3 MB | 4 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [仕琦 牛](https://appshunter.io/developer/1825984616) | [雷 陈](https://appshunter.io/developer/1763048890) |

## What reviewers say

### 橡皮错题

[App page](https://appshunter.io/ios/app/id6748517813)

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

**In-app purchases:** none


### MathBoard

[App page](https://appshunter.io/ios/app/mathboard-mental-arithmetic/id6789140182)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $2.99 | per month |
| Annual Subscription | $12.99 | per year |
| Pro Lifetime Purchase | $24.99 | one-time |


## Frequently asked questions

### Is 橡皮错题 free?

橡皮错题 is free to download, with no in-app purchases.

### Is MathBoard free?

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

### Do 橡皮错题 or MathBoard have ads?

Neither 橡皮错题 nor MathBoard shows ads.

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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.*