# Physics Zen vs Mental Math

The clearest difference is in-app purchases: Mental Math at none against Physics Zen's 5. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Physics Zen sells 5 in-app purchases, starting at $3.99 per 7 days. Mental Math asks for nothing beyond the download.

## The numbers

| Metric | Physics Zen | Mental Math |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Daily | — |
| Size | 269 MB | 25 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Terekhin](https://appshunter.io/developer/888645337) | [Johannes Lauber](https://appshunter.io/developer/1483223615) |

## What reviewers say

### Physics Zen

[App page](https://appshunter.io/ios/app/physics-zen-learn-and-practice/id6808595963)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Physics Zen Weekly | $3.99 | per 7 days |
| Physics Zen Monthly | $6.99 | per month |
| Physics Zen Annual | $29.99 | per year |
| Physics Zen Lifetime | $24.99 | one-time |
| Physics Zen Lifetime | $39.99 | 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 Physics Zen free?

Physics Zen 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 Physics Zen or Mental Math have ads?

Neither Physics Zen 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.*