# 鬼の脳トレ vs Arithmetist

The clearest difference is in-app purchases: 鬼の脳トレ at none against Arithmetist's 1. 鬼の脳トレ also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Arithmetist sells 1 one-off in-app purchase. 鬼の脳トレ asks for nothing beyond the download.

## The numbers

| Metric | 鬼の脳トレ | Arithmetist |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Daily |
| Size | 77 MB | 115 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [walkertest](https://appshunter.io/developer/1691035075) | [Code and DESIGN inc.](https://appshunter.io/developer/1172903960) |

## What reviewers say

### 鬼の脳トレ

[App page](https://appshunter.io/ios/app/id6475755141)

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

**In-app purchases:** none


### Arithmetist

[App page](https://appshunter.io/ios/app/arithmetist/id6557037664)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $2.99 | one-time |


## Frequently asked questions

### Is 鬼の脳トレ free?

鬼の脳トレ is free to download, with no in-app purchases.

### Is Arithmetist free?

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

### Do 鬼の脳トレ or Arithmetist have ads?

Arithmetist shows ads; 鬼の脳トレ does not.

---

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