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Pro

Reaction Tag

Tap the lights before they fade. Never the red ones.

  • Arms and shoulders and Cardio
  • 3 min round
  • Seated version
  • Quiet mode
  • Low impact
How to play
  1. Stand or sit with space around you. Standing, the camera should see you from head to feet.
  2. Tap each green light before it fades. A light on the floor wants a foot.
  3. Leave the red squares alone: touching one costs points.
Difficulty

Normal fits your level. Hard and Expert are part of Pro.

More ways to play
Controls

The camera follows your body. Keyboard and touch are there if you cannot do the movements or have no camera. Those rounds are practice: they are not kept in your records, active days or calories.

This game is part of Pro. You can play it once for free. The camera reads your moves on this device. Nothing is uploaded. Race a ghost: the same course against a recording, any time.

About this game

Green lights come on around you and fade fast. Tap each one with either hand and leave the red squares alone. Every tap shows your reaction time in milliseconds. Harder levels add lights further out and, standing, on the floor.

Where to stand

Full body

Head to ankles in view. Stand 2 to 3 m from a laptop or 1.5 to 2 m from an upright phone.

What it measures

  • How many milliseconds pass between a light and your touch.
  • Whether you tapped a green light or a red one.

It does not measure heart rate or give medical advice.

Seated, quiet and low impact

  • Seated version

    Hands only: the whole game plays from a chair.

  • Quiet mode

    Quiet mode drops the floor lights, so nothing to stamp.

  • Low impact

    Your feet stay on the floor. No jumping.

Safety

Before you start. Check with a doctor if you are pregnant, have a heart or joint condition, or feel pain when you move. Stop if you feel dizzy or a sharp pain. Children play with an adult nearby.