Arithmos Coming soon

Math crossword puzzles

Train your brain, one equation at a time.

Arithmos is a crossword where every line is an equation. Drag numbers into the grid until everything adds up, across and down.

Coming soon on iPhone & Android Try a mini puzzle
  • 120levels
  • 6worlds
  • 4game modes
  • Freeto play
The World Map of the Ocean realm, with finished levels and their stars.
A level in progress: two equations solved and glowing, number tiles in the bank below.

How it works

Try it right here

Every row and every column is an equation. The square where two lines cross belongs to both, so it has to work both ways.

  1. Pick a number

    Tap a tile in the bank, or drag it.

  2. Drop it on a dashed square

    Each blank waits for exactly one number.

  3. Watch it light up

    A line glows when its equation is right.

4 + = 7 × 2 =

Tap a number, then a dashed square.

Game modes

Four ways to play

Follow the story world by world, or jump into a quick puzzle whenever you have a minute.

World Map

120 levels across six themed worlds. Collect stars to open the gate to the next realm.

Daily Puzzle

Extreme

A new grid every day, the same for every player. Keep your streak alive and share your time.

Endless

Pick Easy, Medium, Hard or Expert and solve fresh puzzles for as long as you like.

Time Attack

60 seconds on the clock. Every grid you solve adds 5 more.

Worlds

Six worlds, one grand equation

Each world brings something new, so the challenge grows with you, from first sums to full complexity.

  1. Meadow

    First Sums

    Gentle additions and subtractions to warm up.

    +−

  2. Ocean

    Tides of Times

    Multiplication rolls in with the waves.

    ×

  3. Desert

    Dividing Dunes

    Division joins the mix. Share everything fairly.

    ÷

  4. Space

    Missing Signs

    Now the operators go missing too. Find the numbers and the signs.

    ?

  5. Volcano

    Molten Numbers

    Bigger grids and fiery chains of equations.

    +−×÷

  6. Castle

    The Grand Equation

    Everything at once, for true masters of numbers.

    +−×÷

Screenshots

A closer look

Real screens from the game.

Home screen: continue your level, open the World Map, the Daily Puzzle, Endless or Time Attack.
Pick up where you left offYour streak, stars and hints at a glance.
World Map of the Ocean realm, with finished levels, their stars and the next level to play.
Travel through six worldsEach realm brings a new twist.
A level in progress: two equations solved and glowing, number tiles in the bank below.
Make every line add upCorrect equations light up as you go.
Level complete screen with three stars: under the target time, no hints, no mistakes.
Chase three starsFinish without hints and beat the target time.
Daily Puzzle screen with the Extreme badge, your streak and a preview of today's grid.
A new puzzle every dayThe same Extreme grid for everyone.
An Extreme Daily Puzzle: a nine by nine grid with missing numbers and missing signs.
Extreme means extremeBig grids, hidden signs and decoy numbers.
Endless mode on Expert difficulty, in the dark theme.
Day or nightEndless puzzles, in light or dark.

Why you'll love it

Small grids, big satisfaction

  • One solution, always

    Every grid is checked to have exactly one answer.

  • Hints when you're stuck

    Reveal one square at a time, with a short video or a hint pack.

  • Three stars to chase

    Finish the grid, skip the hints, beat the target time.

  • Plays offline

    Every level is built in, and new puzzles are made on your phone.

  • No account needed

    Open the app and play. Your progress stays on your device.

  • Light and dark

    A bright theme for the day, a dark one for the night.

FAQ

Questions and answers

When will Arithmos be available?

Soon. Arithmos is in its final testing phase and will arrive on the App Store and Google Play.

Is it free?

Yes. Arithmos is free to play. Optional purchases include hint packs and a one-time Remove Ads.

Who is it for?

Everyone. The first worlds suit kids learning their first sums, while Expert grids and the Daily Puzzle will challenge seasoned puzzle fans.

Do I need an internet connection?

No. Every level is built into the app and new puzzles are generated on your device. A connection is only used for ads and purchases.

Which devices are supported?

iPhone with iOS 15 or later, and Android phones with Android 7.0 or later.

How can I get in touch?

Write to contact@zenith-ai.dev.

Ready for today's grid?

Arithmos is coming soon to iPhone and Android.

Get in touch