How good is your eye?
Six free daily games. Five rounds each. One go a day.
No tools, no formulas, no registration. Pure judgement.
Angular Estimation
Play →Angled
48.2°
See an angle for three seconds, then rebuild it from memory on a rotated dial.
Mass & Volume
Play →Halved
CUT: 50.0%
Slice an irregular 3D object so both halves weigh exactly the same.
Ballistic Physics
Play →Dropped
Watch initial launch arc, then predict where the ball lands on the ground.
Center of Gravity
Play →Balanced
CM: 50.0%
Slide a triangular fulcrum to find the equilibrium balance point of an irregular shape.
Numerosity & Subitizing
Play →Counted
24 dots
View a cluttered field for a fraction of a second, then estimate the total count.
Internal Rhythm
Play →Timed
HOLD PAD
Hold the sensor pad for the requested duration while the screen goes dark. No clock.