# CONCENTRATION(神経衰弱ゲーム) vs Spider Solitaire Prime

The clearest difference is iOS requirement: CONCENTRATION(神経衰弱ゲーム) at 9.0 against Spider Solitaire Prime's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | CONCENTRATION(神経衰弱ゲーム) | Spider Solitaire Prime |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/concentration/id1447839201/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 2 weeks |
| Monetization | Free | — |
| Size | 145 MB | 26 MB |
| Requires iOS | **9.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Koichi Iwasaki](https://appshunter.io/developer/1308795626) | [Ark-Networks](https://appshunter.io/developer/1858861303) |

## What reviewers say

### CONCENTRATION(神経衰弱ゲーム)

[App page](https://appshunter.io/ios/app/concentration/id1447839201)

A simple card matching game where players flip pairs of identical cards to collect them. Track your results and enjoy a quiet, ad-free gaming experience.

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Spider Solitaire Prime

[App page](https://appshunter.io/ios/app/spider-solitaire-prime/id6756324116)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CONCENTRATION(神経衰弱ゲーム) free?

CONCENTRATION(神経衰弱ゲーム) is free to download, with no in-app purchases.

### Is Spider Solitaire Prime free?

Spider Solitaire Prime is free to download, with no in-app purchases.

### Do CONCENTRATION(神経衰弱ゲーム) or Spider Solitaire Prime have ads?

Neither CONCENTRATION(神経衰弱ゲーム) nor Spider Solitaire Prime shows ads.

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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.*