ZenGamer

Tool takes 1–2 min

Reaction test

Wait for green, then hit it. Track your own trend.

Mode

Tap the pad, or press Space. Hit it the moment it turns green.

Photosensitivity: the pad changes colour once per try, never more than three times a second, and never flashes.

How to use it

  1. Pick Test for a quick check or Warm-up before you play.
  2. Tap the pad (or press Space). It turns amber: wait.
  3. The moment it turns green, tap. Tapping early counts as "too soon" and that try is repeated.
  4. Look at your median rather than your best: one lucky tap says little.

Why it works

Simple reaction tasks are sensitive to how rested you are. In lab studies, sleep loss slows responses and adds lapses, and the effect builds across several short nights (Basner & Dinges, 2011). Simple attention is the ability most affected by short-term sleep loss (Lim & Dinges, 2010).

People differ a lot in how much tiredness slows them down, so we show no averages or rankings, only your own trend. Your browser, screen and input device add their own delay too, so compare times from the same setup.

When to use it

  • Before a session, as a warm-up for your hands and eyes.
  • Late at night: if your median is well above your usual, that's a sign to stop.
  • On different days, to learn what "normal" looks like for you.

Not medical advice. This is a wellbeing tool, not a treatment. If things feel heavy, talk to someone.