Cross Math

Number crosswords you solve at your own pace.
No timer. No wifi needed.

Plays offline Easy → Expert Free
3
+
=
7
+
5
=
9

How it works

One number has to satisfy both lines. That is the whole game.

  1. Drag a number tile into an empty cell — or tap the cell, then tap the tile.
  2. A line turns green the moment it adds up.
  3. Where two equations cross, the shared cell counts only when both lines are true.
  4. Fill the board to finish the level.

What's inside

Built to be played for five minutes or for an hour.

No timer, ever

There is no clock anywhere in this game. A puzzle you had to rush is not a puzzle you enjoyed.

Every board is solvable

Levels are generated and then checked to have exactly one solution. No guesswork, no dead ends.

Four tiers

Easy, Medium, Hard and Expert — from a single crossing pair up to a nine-by-nine grid.

A puzzle every day

One Daily Challenge, the same one for everyone, marked off on a calendar. Streaks include a day of grace.

Works with no signal

Everything runs on your device. No account, no login, nothing to sign up for.

Easy on the eyes

Large numbers on by default, and a true dark mode built for late evenings rather than inverted.

Screenshots

From the tutorial's first move to a full Expert board.

The home screen: daily challenge, endless, and four difficulty levels An Expert board, nine by nine A Hard board with a tile lifted mid-drag The tutorial showing the first move

Privacy

Cross Math has no account and no server. Your progress, streak and settings live only on your phone. The one exception is advertising, served by Google AdMob — that, and how to turn it off, is set out in full in the privacy policy.