Timer Challenge

Test your internal clock by stopping the timer at exactly the target time

Select Game Mode

Select Target Time

Custom (1–60 seconds)

10s

Target Time

Select a target time, start the challenge, and stop when you think the exact time has passed. No timer is shown - trust your internal clock!

How to Use

Stop the timer when you think the target time has passed. Pick 5, 10, 15, 20 or 30 seconds or set your own target from 1 to 60. Blind Mode hides the clock for the classic 10-second challenge, and Visual Mode shows it so you can practice.

Under 'Select Game Mode', choose 'Blind Mode' (hidden timer) or 'Visual Mode' (see timer).

Under 'Select Target Time', pick 5, 10, 15, 20 or 30 seconds, or type any whole number of seconds from 1 to 60 into 'Custom'.

Press 'Start Challenge', then 'Stop' when you think the time is up.

You'll see your time to two decimal places, your accuracy, and whether you stopped early or late, for example '0.23s too early'.

'Best Accuracy' is saved separately for each mode and target, so it is still there next time you visit.

Pro Tips

Accuracy is your error as a share of the target. Being 0.5 seconds off scores 95% at 10 seconds but about 98.3% at 30 seconds.
Check 'Recent Attempts' for a pattern. If you keep stopping early, count a little slower.
Do a few rounds in Visual Mode to calibrate, then switch to Blind Mode to see how far your internal clock drifts.
To test reflexes instead of timing, try the Reaction Speed Test.

Use Cases

Popular ways to play:

The 10-second challenge

A party game where the closest to 10.00 wins.

Example: Play Blind Mode one at a time. Whoever misses by the most takes the forfeit.

Streams and short videos

Try to hit the target on camera.

Example: Use 'Custom' for targets the buttons don't cover, such as 7 seconds. Results go to hundredths of a second, so there's almost always a clear winner.

Practicing pacing

Get a feel for how long 30 seconds or a full minute is.

Example: Handy before a timed speech, an elevator pitch or reading aloud. Targets go up to 60 seconds.

Frequently Asked Questions

How close counts as good?

At 99% accuracy or better you get 'Perfect! Amazing timing!', and at 95% or better 'Excellent! Very close!'. For a 10-second target that means within 0.1 and 0.5 seconds.

What's the difference between Blind Mode and Visual Mode?

Blind Mode shows nothing while the timer runs, so it's all feel. Visual Mode shows the clock. Because the difficulty differs, each mode keeps its own best accuracy.

Are my results saved?

Your best accuracy for each mode and target is saved in this browser and survives a refresh or a later visit. The 'Recent Attempts' list is cleared when you refresh, and 'Reset All Stats' also deletes the saved bests.