Arithmetic territory

Trio Math

A maths puzzle game for phones and tablets.

Trio Math is a free maths puzzle game for Android and iPhone. You place numbered tiles on a grid; when a line of three reads as a sum, those squares become yours. Whoever owns the most squares when the board fills up wins.

A line scores read left to right or right to left — 4 + 2 = 6, or 6 − 2 = 4 — so you never have to check a line twice. You can play on your own, against a stranger, or against a friend, and everybody in the world gets the same Daily Board.

Ways to play

The Daily Board. Three boards a day — a short one, the usual one and a long one — and everybody in the world gets the same three deals. That is what makes comparing scores mean anything.
Online, live. Forty-five seconds a turn against a real person.
Online, relaxed. A day a turn. Put your phone down between moves and keep up to three games going.
Story. Seven chapters, from adding on a small board to the full game on a nine by nine.
Free play. Your own rules — board size, which relations count, and how hard the opponent thinks.

How it is meant to work

Both sides start with the same four tiles, and draw from one shared bag. Whatever separates two scores is what the two players did with an identical opening — not who drew better.

No advertising, and nothing sold about you. There is one optional purchase — the Royal season pass — and it changes nothing but how your tiles look. Both players always open with the same rack. Signing in is optional; the whole game works without an account.

No free-text chat. There is no way to type a message to another player. Emotes and phrases are chosen from a fixed set.