# Kuku Robo vs Clock Challenge

The clearest difference is price: Kuku Robo at Free against Clock Challenge's $0.99. Kuku Robo also leads on update cadence (every 3 months vs every 15 months). Clock Challenge's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.

Kuku Robo is free to download; Clock Challenge costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Kuku Robo ships an update every 3 months, Clock Challenge every 15 months. The most recent releases landed on October 23, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | Kuku Robo | Clock Challenge |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 15 months |
| Monetization | Ad-supported | — |
| Size | 57 MB | 59 MB |
| Requires iOS | 15.0 | **14.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MASAHIRO MIZUTANI](https://appshunter.io/developer/368158224) | [Jariya Tuantranont](https://appshunter.io/developer/404509814) |

## What reviewers say

### Kuku Robo

[App page](https://appshunter.io/ios/app/kuku-robo/id562517412)

Master multiplication with a Japanese method called 'Kuku'. This app offers various levels ('Dan') to practice and improve your math skills. It's designed for consistent effort to build a strong foundation in mathematics.

**Highlights:** Learn Kuku multiplication method, Practice with different 'Dan' levels, Improve math skills, Track progress through practice, Designed for consistent effort

**Features:** Vision Pro support

**In-app purchases:** none


### Clock Challenge

[App page](https://appshunter.io/ios/app/clock-challenge/id597084739)

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

**In-app purchases:** none


## Frequently asked questions

### Is Kuku Robo free?

Kuku Robo is free to download, with no in-app purchases.

### Is Clock Challenge free?

Clock Challenge costs $0.99, with no in-app purchases.

### Do Kuku Robo or Clock Challenge have ads?

Kuku Robo shows ads; Clock Challenge does not.

### Which is updated more often, Kuku Robo or Clock Challenge?

Kuku Robo ships an update every 3 months, and Clock Challenge every 15 months. Most recently, Kuku Robo was updated on October 23, 2026 and Clock Challenge on October 18, 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.*