# [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム vs StroopEffect2

The clearest difference is price: [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム at Free against StroopEffect2's $2.99. [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム also leads on iOS requirement (6.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

[大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム is free to download; StroopEffect2 costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

[大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム ships an update every 26 months, StroopEffect2 every 14 months. The most recent releases landed on September 8, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム | StroopEffect2 |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/id894298232/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 26 months | **Every 14 months** |
| Monetization | **Free** | Paid |
| Size | 9 MB | 2 MB |
| Requires iOS | **6.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [REP COM Inc.](https://appshunter.io/developer/702707146) | [Yasuyoshi Ota](https://appshunter.io/developer/1500357652) |

## What reviewers say

### [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム

[App page](https://appshunter.io/ios/app/id894298232)

This game challenges players to quickly identify if the current symbol matches the previous one by tapping 'O' or 'X'. It's designed to improve concentration and pass the time for users of all ages.

**Highlights:** Symbol matching gameplay, Improves concentration, Suitable for all ages, Free to play, Time-killing activity

**Features:** macOS Compatibility

**In-app purchases:** none


### StroopEffect2

[App page](https://appshunter.io/ios/app/stroopeffect2/id1050388935)

This app demonstrates the psychological phenomenon known as the Stroop effect. It presents a time-trial game where users must identify the color of words, even when the word itself names a different color. It's a fun way to explore cognitive processing and reaction times.

**Highlights:** Stroop effect demonstration, Time trial game mode, Cognitive processing experiment, Reaction time measurement, Educational psychology tool

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

**In-app purchases:** none


## Frequently asked questions

### Is [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム free?

[大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム is free to download, with no in-app purchases.

### Is StroopEffect2 free?

StroopEffect2 costs $2.99, with no in-app purchases.

### Do [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム or StroopEffect2 have ads?

Neither [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム nor StroopEffect2 shows ads.

### Which is updated more often, [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム or StroopEffect2?

[大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム ships an update every 26 months, and StroopEffect2 every 14 months. Most recently, [大人の脳トレ] 決断力をあげろ！小学生から大人まで無料で暇つぶしが出来るゲーム was updated on September 8, 2026 and StroopEffect2 on September 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.*