About Odometer

Odometer is a browser number game built around the one piece of arithmetic almost everyone already reads without thinking: a row of wheels, each counting 0 to 9, each rolling over into the wheel on its left. You have seen it on a car dashboard, a water meter, an old cassette counter. The game asks nothing more of you than that.

How it plays

You are handed digits one at a time and choose which wheel to feed. A wheel that reaches 9 is primed — one tick from rolling over — and pays as it arrives. Because a carry only travels leftward, the rightmost wheel is the single place where one move can reach every wheel on the board. Prime everything, feed that wheel, and the entire board rolls at once: a perfect sweep, worth five times the points, and the carry off the left edge becomes a whole new digit.

The tension is not speed or reflex. It is patience. Every tile you place either builds toward that sweep or spends it early for a smaller, safer payout. Overflowing the board without rolling every wheel costs points, so the game warns you before you do it and lets you go ahead anyway. There is no way to lose — only to score less than you could have.

Shape of a run

Four stages, fifty tiles each, with the odometer growing a digit wider as you clear targets. After the fourth stage it keeps going, with targets that climb. A daily mode gives everyone the same seeded sequence of tiles, so a run is comparable rather than lucky.

Where it came from

It began as an experiment in whether a game could be legible on sight — no tutorial, no glossary, no five minutes of setup. The odometer was the answer: a mechanism people already understand, pointed at a scoring system that rewards planning several moves ahead. It is free, runs entirely in your browser, and needs no account.

Music is by Kevin MacLeod (incompetech.com), licensed CC BY 4.0.