---
title: "Janken — App Overview"
url: https://marlvel.ai/apps/janken
category: Games
developer: Yanis KERRIOU
platforms: ios
rating: N/A (0 ratings)
pricing: free
report_level: overview
generated: 2026-05-09
last_verified: "2026-05-09T05:46:22.017Z"
---

<!-- SECTION: Key Insight -->
> **Key Insight:** Janken is a minimalist, reflex-based game that adds a time-pressure mechanic to the traditional rock-paper-scissors format.

<!-- SECTION: Quick Facts -->
| Metric | Value |
|--------|-------|
| Category | Games |
| Rating | N/A ★ (0) |
| Pricing | free |
| Platforms | iOS |
| Latest Version (iOS) | 1.2.1 |
| Developer | Yanis KERRIOU |

<!-- SECTION: Summary -->
## What is Janken?

Janken is a mobile game that challenges users to play rock-paper-scissors against their iPhone. The app incorporates a time-pressure mechanic where the referee reduces the player's remaining time as they achieve consecutive wins.

<!-- SECTION: Key Features -->
## Key Features

- **Rock Paper Scissors Gameplay**: Users compete against the iPhone in classic rounds of rock-paper-scissors.
- **Dynamic Time Constraint**: The referee decreases the player's remaining time as they successfully win rounds, increasing the difficulty.

<!-- SECTION: Target Audience -->
## Who is it for?

Casual gamers looking for a quick, reflex-based challenge.

<!-- SECTION: Links -->
## Links

- [App Store](https://apps.apple.com/us/app/janken/id1562490628?uo=4)
- [Full Intelligence Report](https://marlvel.ai/apps/janken)

---
*This is an overview report. Sentiment analysis, competitive landscape, and SWOT analysis are available in the [full intelligence report](https://marlvel.ai/apps/janken).*
*Generated by [Marlvel.ai](https://marlvel.ai) — Independent app intelligence.*