StroopEffect2 vs ぱっとフラッシュ！
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
StroopEffect2
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.
- Stroop effect demonstration
- Time trial game mode
- Cognitive processing experiment
- Reaction time measurement
- Educational psychology tool
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Stroop Effect Experiment app. Time Trial Game. Stroop Effect(from WIKIPEDIA in 2011.01.21) In psychology, the Stroop effect is a demonstration of the reaction time of a task. When the name of a color (e.g., "blue," "green," or "red") is printed in a color not denoted by the name (e.g., the word "red" printed in blue ink instead of red ink), naming the color of the word takes longer and is more prone to errors than when the color of the ink matches the name of the color.
ぱっとフラッシュ！
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ひらがな、カタカナ、数字、アルファベットを“パッ！”と表示！ 遊びながら、読む力・ひらめき力を育てる知育アプリです。 このアプリは、3歳の息子のためにパパが心を込めて作りました。 ただの文字学習ではなく、「一瞬で読む力」を育む“フラッシュカード形式”で、脳を刺激し、読書速度や発想力の向上にもつながります。 親子で一緒に楽しむことで、子どもは安心して学び、もっと笑顔に。 一人で遊ばせるためのアプリではなく、親子の時間を楽しむツールとしてぜひご活用ください。
Screenshots
Verdict
The clearest difference is price: ぱっとフラッシュ！ at Free against StroopEffect2's $2.99. ぱっとフラッシュ！ also leads on update cadence (every 3 weeks vs every 14 months) and iOS requirement (12.0 vs 15.6). StroopEffect2's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
ぱっとフラッシュ！ is free to download; StroopEffect2 costs $2.99 up front. ぱっとフラッシュ！ sells 1 one-off in-app purchase. StroopEffect2 asks for nothing beyond the download.
StroopEffect2 ships an update every 14 months, ぱっとフラッシュ！ every 3 weeks. The most recent releases landed on September 18, 2026 and September 26, 2026 respectively.
| Parameter | StroopEffect2 | ぱっとフラッシュ！ |
|---|---|---|
| Price | $2.99 | Free — better |
| Positive reviews | 100.0% of reviews | — |
| Update frequency | Every 14 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 12.0 — better |
| Further details — not scored | ||
| Size | 2 MB | 30 MB |
| Age rating | 4+ | 4+ |
| Developer | Yasuyoshi Ota | takeshi hirayama |
In-app purchases
StroopEffect2
No in-app purchases
ぱっとフラッシュ！
- Unlock Limit$0.99
Questions
Is StroopEffect2 free?
Is ぱっとフラッシュ！ free?
Do StroopEffect2 or ぱっとフラッシュ！ have ads?
Which is updated more often, StroopEffect2 or ぱっとフラッシュ！?
Other comparisons
