Starts simple.
Keeps growing.

Put the digits 1 to 9 in the circles, each once, so every equation is true. You'll learn it in a minute, and the game keeps adding to it from there.

Download on theApp Store

Try it. Tap a digit to fill the ringed circle. Arrows point to each line's answer.

Free to play
No ads anywhere
No timer in your score
One answer every puzzle
Works offline
New Daily every midnight UTC

The home screen: today's Daily, Endless and the first areas — Home: today's Daily, Endless, and your areas in order.

Play

Each tier adds something new.

The digits and the goal stay the same. What you need to reach it grows. When × and ÷ first appear, the board tells you how they read. These are real puzzles from the game: pick one and play it here.

Unlocks

Every solve opens something.

Each area is a transit map. Puzzles are stations and each difficulty is a line. Solve along a line and the next one opens where they meet. Finish an area and you earn the next one, plus themes and badges along the way.

Area 2 · Tangle

Tap a ringed station to solve it.

Your formula: puzzles solved on each line, Easy to Expert. Every area adds to the one on your home screen.

Every day

One puzzle for everyone.

At midnight UTC a new Daily goes live, the same board for the whole world. It's Easy on Monday and Expert by the weekend. You get one ranked try, with no hints, and then see how your friends did.

Keep a streak going. A freeze covers a missed day.
Share your result as coloured squares, with no spoilers.
Two years of Dailies, ready to go.

Rewards

Plenty to complete.

1,435: puzzles in the app, every one checked for a single answer
15: areas to ride end to end
11: themes, each with its own app icon
39: Game Center achievements

A few of the 39 badges

The theme ladder

Each theme has its own way to earn it.

Learn it in a minute.
Then see how far you get.