# くるくるボール vs Arithmetist

The clearest difference is in-app purchases: くるくるボール at none against Arithmetist's 1. くるくるボール also leads on iOS requirement (10.0 vs 12.0). Arithmetist's advantage is update cadence (daily vs every 7 months). On price, ads and device support there is nothing between them.

Both are free to download. Arithmetist sells 1 one-off in-app purchase. くるくるボール asks for nothing beyond the download.

くるくるボール ships an update every 7 months, Arithmetist daily. The most recent releases landed on October 29, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | くるくるボール | Arithmetist |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 7 months | **Daily** |
| Size | 64 MB | 115 MB |
| Requires iOS | **10.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Seiya Kashiwakura](https://appshunter.io/developer/1564461826) | [Code and DESIGN inc](https://appshunter.io/developer/1172903960) |

## What reviewers say

### くるくるボール

[App page](https://appshunter.io/ios/app/id1571430487)

**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 くるくるボール free?

くるくるボール is free to download, with no in-app purchases.

### Is Arithmetist free?

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

### Do くるくるボール or Arithmetist have ads?

Both くるくるボール and Arithmetist show ads.

### Which is updated more often, くるくるボール or Arithmetist?

くるくるボール ships an update every 7 months, and Arithmetist daily. Most recently, くるくるボール was updated on October 29, 2026 and Arithmetist on October 30, 2026.

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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.*