Zero In
Six numbers.
One target.
Beat the ring.
Every level hands you six numbers and a target. Build rows with + − × ÷, chain your results, and hit the number before the timer ring drains. Then do it nine more times.
Ten levels free. One purchase unlocks the whole game, $1.99, once and forever.
An animation of an example puzzle: six numbers combine step by step to reach the target before the timer ring runs out.
Three moves, over and over
The rules fit in a sentence. Getting fast at them is the game.
Drop two numbers
Drag any two of your six numbers into a row. Each one can be used only once, so spending a 100 early is a decision.
Pick an operation
Tap the middle slot and choose plus, minus, times or divide. Division has to come out even, which rules out most of them.
Chain the result
Every row makes a new number you can drag into a later row. Five rows, one target, and a ring that keeps draining.
Built to be replayed
No energy bars, no timers between runs, no nagging. Buy it once and it is yours.
Every puzzle is solvable
Each one is generated with a verified solution before you ever see it. If you cannot find it, it is there.
The ring is the clock
The timer wraps the target. It turns amber, then coral, then it is gone. You always know where you stand.
Hints when you want them
Ask for a nudge, or finish the level and watch the solution play out step by step with the reasoning behind it.
Near counts, a little
Land inside the near range and you pass with a distance penalty. Hit it exactly and you take the full bonus.
A global board
Pick a display name and your best run goes up against everyone else's. No sign-up, no email, no profile.
Sound you can switch off
Three music tracks, sound effects and haptics, each with its own toggle. The whole game works in silence.
Easy, Medium, Genius
Finish ten levels to unlock the next tier. The clock shortens, the near range tightens, and the points get bigger.
- Starting clock
- 150s
- Near range
- ±10
- Exact bonus
- +25
- Starting clock
- 120s
- Near range
- ±8
- Exact bonus
- +50
- Starting clock
- 100s
- Near range
- ±5
- Exact bonus
- +75
Dark, fast, no clutter
Short answers
What does it cost?
The first ten levels, the whole Easy tier, are free so you can decide whether you like it. Unlocking Medium, Genius and the rest of the campaign is a single purchase of $1.99. There is no subscription, no advertising and nothing else to buy.
I got a new phone. Do I lose anything?
No. Your purchase is tied to your Apple Account and comes back on its own; if it doesn't, open Settings → Full Game → Restore Purchases. Your progress, best score, display name and settings sync through your own iCloud account, so a new iPhone or a reinstall picks up where you left off.
Do I need an account?
No. Your progress lives on your device and in your own iCloud account, which we can't see. If you want to appear on the global leaderboard you pick a display name, and that is the only thing you ever tell us.
Can every puzzle actually be solved?
Yes. Each puzzle is generated together with a verified solution, and the game checks that solution before showing you the level. After a level ends you can watch that solution play out.
What if I get close but not exact?
You can pass on a near-target result and keep the run alive, with points deducted for the distance. The range is ±10 on Easy, ±8 on Medium and ±5 on Genius.
Does it work offline?
Completely. Puzzles are generated on your device. Only the global leaderboard needs a connection, and it catches up later if you are offline.
Which devices does it run on?
iPhone running iOS 17 or later, in portrait. It follows your text size settings and works with Reduce Motion.
What data does it collect?
Very little: your display name and best score if you join the leaderboard, and optional gameplay events, tied to a random device ID rather than your Apple Account. The privacy policy lists every field that leaves your device, and analytics can be switched off in Settings.
Ready to zero in?
Ten free levels to learn it, then one purchase for the rest and a leaderboard that never stops moving.
