Make room
for zero.
A few numbers. A little strategy.
Find your way to zero, one satisfying expression at a time.
Less on the board. More in the mind.It all adds up.
Until it doesn’t.
Clear the tiles by making expressions that equal zero. The next move is yours to find.
Pick what’s on top.
Choose uncovered number and operator tiles. Each tile you remove opens up new possibilities below.
Think left to right.
Alternate numbers and operators in a seven-slot tray. Operations happen in the order you choose them, from left to right.
Make zero. Make space.
When a complete expression equals zero, its tiles clear. Keep going until both stages are empty.
Tap 3 to start your first expression.
Easy to begin.
Room to go deeper.
Start with a smaller board. Then take on a deeper, layered puzzle. Shuffle, undo, and set tiles aside to rethink your next move.
Clear both stages to save your time to the shared leaderboard. Your fastest completed run is the one to beat.
Two stages. Seven spaces.
One very satisfying finish.
A few good
questions.
Do I need to create a login?
No email or password is required to start. The app automatically creates a player identity to connect your runs and leaderboard results. Read more in our Privacy Policy.
Does normal order of operations apply?
No. Expressions are calculated from left to right. For example, 3 + 2 × 4 becomes 20. Negative numbers and fractional intermediate results are supported. A single zero does not clear on its own.
How does the timer work?
Timing starts with your first successful tile selection in stage one. Time between stages and time spent in the background count. Restarting begins again at stage one; an unfinished run cannot be restored after closing the app.
When does the leaderboard update?
A completed run is checked by the server before it is saved. Rankings refresh periodically, so a saved result may take a few minutes to appear. You need an internet connection to start an online run and submit your result.
Does the app show ads?
The app includes third-party advertising. Where iOS asks for tracking permission, you can decline it and still use the game. See our advertising and privacy information.