# 1×1 Master vs Mental Math

The clearest difference is in-app purchases: Mental Math at none against 1×1 Master's 3. Mental Math also leads on device support (3 vs 1) and iOS requirement (15.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. 1×1 Master sells 3 one-off in-app purchases. Mental Math asks for nothing beyond the download.

## The numbers

| Metric | 1×1 Master | Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Size | 1 MB | 25 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sascha Wagner](https://appshunter.io/developer/1888523022) | [Johannes Lauber](https://appshunter.io/developer/1483223615) |

## What reviewers say

### 1×1 Master

[App page](https://appshunter.io/ios/app/11-master/id6785290352)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Schüler | $2.00 | one-time |
| Supporter | $4.00 | one-time |
| Hero | $9.00 | one-time |


### Mental Math

[App page](https://appshunter.io/ios/app/mental-math-learn-math/id6809820085)

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

**In-app purchases:** none


## Frequently asked questions

### Is 1×1 Master free?

1×1 Master is free to download, with in-app purchases available.

### Is Mental Math free?

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

### Do 1×1 Master or Mental Math have ads?

Neither 1×1 Master nor Mental Math 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.*