Sense of Time

Diagnose your sense of time.

The more you do it, the more your sense of time will be sharpened.

It does not use the 5 senses for the specified time, and it fits perfectly in milliseconds.

The difference from the specified time is displayed as a result.

The highest record is saved. Set all records to "0"

Recent changes:
ver 1.0
-Aim for exactly 5 to 20 seconds
-Sound at start and stop
-Records this time and overall