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

Angled

Play →
48.2°

See an angle for three seconds, then rebuild it from memory on a rotated dial.

Mass & Volume

Halved

Play →
CUT: 50.0%

Slice an irregular 3D object so both halves weigh exactly the same.

Ballistic Physics

Dropped

Play →
42.5 m

Watch initial launch arc, then predict where the ball lands on the ground.

Center of Gravity

Balanced

Play →
CM: 50.0%

Slide a triangular fulcrum to find the equilibrium balance point of an irregular shape.

Numerosity & Subitizing

Counted

Play →
24 dots

View a cluttered field for a fraction of a second, then estimate the total count.

Internal Rhythm

Timed

Play →
2.5s
HOLD PAD

Hold the sensor pad for the requested duration while the screen goes dark. No clock.