Dynamic Visual Acuity vs Reflex

Numbers pass in front of your eyes at high speed, and you must enter the number and answer with a check mark. Each time you answer correctly, the number of digits passing by increases. There are two modes: High Speed and Low Speed. Aim for a high ranking in the national ranking!

How fast are you, really? Reflex measures your reaction time with 8 unique games designed to test speed, precision, and hand-eye coordination. STREET LIGHT Inspired by F1 race starts. Watch the lights count down, then tap the instant they go out. Your reaction time is measured to the millisecond. SQUARE CHASE A 5x5 grid lights up one tile at a time. Tap 10 colored squares as fast as you can. Every millisecond counts. AIM TRAINER A full 3D first-person target range. Drag to aim, tap to shoot, and rack up points before time runs out. Adjustable sensitivity and customizable crosshair colors. COLOR CHOOSER A color swatch appears — tap the matching shade exactly. Tests visual discrimination and rapid color recognition. COLOR MATCH The word says one color, but the ink is another. Tap the ink color, not the word. A classic test of cognitive speed under pressure. EMOJI MATCH A grid of emoji — find and tap the matching pair before the clock runs out. Simple premise, surprisingly demanding. SLIDERS Three sliders move at different speeds. Tap each one when it hits the target zone. Tests timing precision and multi-tasking. TIME STOP A timer counts up — tap to freeze it exactly on target. Pure precision. Zero margin for error. TRACK YOUR PROGRESS Best times and high scores are saved locally. See your personal bests right from the main menu and push yourself to beat them. Clean, distraction-free design. No accounts required. Just open and play.