A LITTLE EXPERIMENT IN YOUR DAY
When are you sharpest?
Morning, afternoon, or one more game? Try a quick reaction round at different times over a few days. Let your own pattern take shape.
1 · Try a round
When the circle turns green, tap it as fast as you can. Don't tap early.
One practice round, then 10 timed rounds (about 1 minute). Tap, click, or press Space. Switching tabs ends the run.
2 · Watch your pattern grow
History stays in this browser. Only hourly values go to the calculation service; exact dates and time zone stay here. Clearing browser data removes this history.
Your first point is waiting for you
Finish a round above to start your chart. A single run can't tell you which time works best.
Rounds saved in this browser: 0
3 · Leave yourself a reminder
Download a calendar file for one short round a day for a week. Import it into your calendar and choose another time for a later week. Calendar apps control alerts; this page sends no notifications.
A pattern needs more than one day
Use the same device and input, with similar lighting and posture. Try different waking hours over several days. Practice, sleep, distraction and display delay can all move your result. Don't stay up to collect a late-night point.
Only the values needed to calculate your plan go to Helibrain's test service. No calendar connection, names or event titles are needed.
The thinking behind this tool
Circadian timing, time awake and individual preferences can influence performance. This short task cannot separate those influences or identify your biological clock. The chart describes your taps, not your overall mental ability.
Sources checked 5 November 2026 · By the Helibrain team
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