3-Minute Daily Brain Workout!
A training tool to sharpen your information processing speed and attention.

How to Play
・Mobile/Tablet: Tap the screen

“Colorful Card Training” is a simplified, app-based version of two out of four task exercises from a higher cognitive function training program. It’s designed to train your brain’s “see → decide → act” information processing cycle.

What You’ll Train
Players must quickly and accurately recognize, match, and respond to one of four symbols—asterisk, equal sign, square, or star—displayed on cards in three colors (red, blue, yellow).

Score Report
At the end of each exercise, you’ll see:
・Total completion time
・Number of errors (out of 48 trials)
・Your personal best (Top 10)

─── Features ───
・Track your progress every day and feel your reaction speed and attention improve!
・Simple, distraction-free UI—perfect for a quick session during your commute or break.

Data Privacy
This app is not intended for medical diagnosis and does not collect any personal information or play data.