Perfect 10s

Perfect 10s is a free timing challenge in your browser. Stop a hidden clock exactly at 10.00 seconds using nothing but your internal sense of rhythm. Your closest stop is saved on this device as the score to beat.

Also known as: 10 second challenge, stop at 10 seconds, internal clock game

Stop a ticking clock exactly at 10.00 seconds. Elapsed time stays hidden from the moment you press Start, so you have to rely on internal rhythm.

How to play Perfect 10s

  1. Press Start. The target is always 10.00 seconds; elapsed time stays hidden from that moment.
  2. Count to ten in your head while the clock ticks out of sight.
  3. Press Stop when you believe 10.00 seconds have passed.
  4. If you do not stop by 20.00 seconds, the round auto-stops at that time.

There is no points score — each round is measured by how close you stopped to 10.00 seconds, shown as a signed delta and actual time. Your closest stop is saved on this device as “Your best to beat”.

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