How many?

How big? ESTIMATION

Drag the shape to guess the size of a real thing, against a reference that never changes.

Fermi ESTIMATION

A daily estimation puzzle game. You get three questions and one guess each, to land as close to the real answer as possible. You're scored on how close you get, as a multiple.

100 of Us ESTIMATION

Of 100 people in the world, how many…? Press and hold to guess, then see the real number with its source.

Estimania ESTIMATION

A fun, 2-minute daily estimation game. Guess the numbers behind five interesting real-world facts and see how good your intuition really is over your morning coffee.

Tilt ESTIMATION

A daily weighing game: one thing sits on a balance scale and you guess how many of something else it takes to balance it, like how many honeybees weigh as much as a horse.

Where? GEOGRAPHY

A silhouette, a name, an empty world map: move the map under the crosshair to where the animal lives, then see its real range.

Who? TRIVIA

Guess what the crowd actually answered, from published surveys. Five rounds a day; the reveal shows the crowd's answer beside your guess.

How big? ESTIMATION

Drag the shape to guess the size of a real thing, against a reference that never changes.

When? HISTORY

Guess when a real event happened by placing it on a timeline.

How expensive? PRICE

One item, one place, one date: set the price it cost, then see the real price from official price statistics.