# ReflexChallengeGame vs Kariuchi

The clearest difference is in-app purchases: ReflexChallengeGame at none against Kariuchi's 1. Kariuchi's advantage is iOS requirement (14.0 vs 16.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kariuchi sells 1 one-off in-app purchase. ReflexChallengeGame asks for nothing beyond the download.

ReflexChallengeGame ships an update every 3 weeks, Kariuchi every 5 weeks. Both last shipped on November 7, 2026.

## The numbers

| Metric | ReflexChallengeGame | Kariuchi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 20 MB | 14 MB |
| Requires iOS | 16.4 | **14.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [KyoungHun Joo](https://appshunter.io/developer/1529420794) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### ReflexChallengeGame

[App page](https://appshunter.io/ios/app/reflexchallengegame/id1529420792)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kariuchi

[App page](https://appshunter.io/ios/app/kariuchi/id1665475494)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads | $1.99 | one-time |


## Frequently asked questions

### Is ReflexChallengeGame free?

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

### Is Kariuchi free?

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

### Do ReflexChallengeGame or Kariuchi have ads?

Both ReflexChallengeGame and Kariuchi show ads.

### Which is updated more often, ReflexChallengeGame or Kariuchi?

ReflexChallengeGame ships an update every 3 weeks, and Kariuchi every 5 weeks. Most recently, ReflexChallengeGame was updated on November 7, 2026 and Kariuchi on November 7, 2026.

---

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