# CONCENTRATION(神経衰弱ゲーム) — The Something series.

> Classic memory matching card game with result tracking. (iPhone/iPad app by Koichi Iwasaki.)

- Source: https://appshunter.io/ios/app/concentration/id1447839201 (this page in markdown: same URL + `.md`)
- Developer: [Koichi Iwasaki](https://appshunter.io/developer/1308795626)
- Category: Games, Card, Family
- Price: Free
- Rating: 3.00/5 from 1 App Store ratings · 1 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 145 MB
- Languages: American English
- Released: 2019-03-09
- Data updated: 2026-07-05
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/concentration/id1447839201/reviews.md

## What is CONCENTRATION(神経衰弱ゲーム)?

I provide the Concentration(Japanese Shinkeisuijaku) application that it is easy to play. It is able to understand the rule of this game, Let's play in your free time!

This game has various result of you playing. After that you could confirm them, it is fun!

Rule is simple. Fifty two cards are on the screen. When you turn, you choose two cards, then if they are same number, you will get them.
All cards are gained by players, after that the winner is the person who have a lot cards.

- Additional information
This game does not have sounds. You can play quietly.


- Official Twitter
https://twitter.com/KOHCHAN_STUDIO

- Official page
https://kohchanstudioinfo.wixsite.com/products

## Key features

- Simple card matching gameplay
- Track game results
- Quiet, no sound experience
- Ad-free gameplay
- Suitable for all ages

## Recent user reviews (1 of 1)

All indexed reviews: https://appshunter.io/ios/app/concentration/id1447839201/reviews.md

### 3/5 — Concentration game

*2019-10-22*

I want to be able to pick number of players. 
I’d like to play alone. 
The other cheat.

## Frequently asked questions about CONCENTRATION(神経衰弱ゲーム)

### What is Concentration?

Concentration is a classic memory matching card game where players flip two cards at a time to find matching pairs. The goal is to collect the most pairs by the end of the game.

### How do you play Concentration?

The game starts with 52 cards face down. Players take turns flipping two cards. If the cards match, the player keeps them. If they don't match, they are flipped back face down. The player with the most cards at the end wins.

### Does Concentration have sound?

No, Concentration does not have any sounds, allowing for a quiet and uninterrupted gaming experience.

### Can I track my progress in Concentration?

Yes, the game provides various results from your gameplay that you can confirm afterwards, adding an element of fun and progress tracking.

### Does Concentration have ads?

No, Concentration is ad-free, providing a clean and uninterrupted gaming experience for all players.

### What devices is Concentration available on?

Concentration is supported on iPhone, iPad, and iPod devices.

### What is the age rating for Concentration?

Concentration has an age rating of 4+, making it suitable for a wide range of players.

### How often is Concentration updated?

The application was last updated on March 9, 2019, with version 1.0.0. Further update frequency is not specified.

## Version history (last 1 release)

### 1.0.0 — 2019-03-09

No release notes.

## Apps similar to CONCENTRATION(神経衰弱ゲーム)

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Memory - FeinGames](https://appshunter.io/ios/app/memory-feingames/id6581482201) | 5.0 (1) | Free | Games |
| [CardMatching AutumnLeaves](https://appshunter.io/ios/app/cardmatching-autumnleaves/id6468483005) | — | Free | Games |
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| [Match Two Cards](https://appshunter.io/ios/app/match-two-cards/id1107320199) | 4.2 (5) | Free | Games |
| [Concentration : Card Gamepedia](https://appshunter.io/ios/app/concentration-card-gamepedia/id1586902492) | 4.3 (4) | Free | Games |

## More apps by Koichi Iwasaki

- [Samurai Drama](https://appshunter.io/ios/app/samurai-drama/id1308795627)
- [SevenNarabe](https://appshunter.io/ios/app/sevennarabe/id1439039394)
- [Old Maid(Babanuki)](https://appshunter.io/ios/app/old-maidbabanuki/id1444817189)
- [Speed(Card game)](https://appshunter.io/ios/app/speedcard-game/id1451181232)
- [Butanoshippo(Card game)](https://appshunter.io/ios/app/butanoshippocard-game/id1452783527)

All apps by Koichi Iwasaki: https://appshunter.io/developer/1308795626

## Related topics

[concentration cards](https://appshunter.io/ios/topics/concentration-cards)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-05.*