Käsekästchen app icon

Käsekästchen

Draw the lines. Win the boxes.

The schoolyard dots-and-boxes classic, rebuilt for iPhone and iPad. You don’t tap the lines — you draw them with your finger, and the board fills up looking like a real squared notebook.

4 Board sizes
6 Themes
0 Ads
Download on the App Store

Free · iPhone & iPad · iOS 26 or later

How It Works

The rules everyone already knows from the back of a school exercise book.

1

Draw a line

Take turns drawing a line between two neighbouring dots. The stroke doesn’t have to be accurate — it snaps to the nearest valid edge.

2

Close a box

Complete the fourth side of a box and it’s yours — and you go again. Two boxes at once with a single line counts double.

3

Own the paper

When the last line is drawn, whoever owns more boxes wins. The chain endgame is where the real game is decided.

Why This One

Every dots-and-boxes app can beat you. This one is built to be pleasant to lose to.

✏️

Drawing, not tapping

A forgiving drag gesture with pencil sound and haptics. Every line renders as a slightly wobbly, overshooting pen stroke — no two look alike.

🧠

A fair “hard” mode

Four levels: Anfänger, Fortgeschritten, Profi and Brutal. Profi plays the chain endgame exactly right but shows mercy now and then. Brutal switches the mercy off.

👥

Two players or the computer

Pass & play on one device, or take on the computer on your own. Nothing to sign up for, nobody to wait for.

📐

Four board sizes

3×3 for a quick round on the bus, 5×5 and 7×7 for a proper game, 9×9 for a marathon. Games in progress are saved and resumed later.

🧘

Calm by design

After 15 minutes of play the app takes a hard break and locks itself for half an hour. No streaks, no reward loops, no notifications pulling you back.

Built to be usable

VoiceOver, Dynamic Type and Reduce Motion are supported, and every theme’s two inks stay tellable apart with red/green colour blindness.

Six Kinds of Paper

Light and dark, from the school exercise book to a neon night board. Each one is a paper, a pair of inks and a stroke weight.

Exercise Book Light

Off-white ruled paper, blue and red biro. The default, and the one the app is named after.

Violet & Rust Light

The cool, precise one: violet and burnt orange on a barely tinted white.

Kraft Paper Light

Brown packing paper with espresso and deep teal — the warm one.

Blueprint Dark

Deep navy drafting paper, chalk white against amber. A finer pen than the biro.

Chalkboard Dark

White and yellow chalk on a school blackboard — how the game gets played when there is no paper.

Neon Dark

Cyan against magenta, lit up. The loudest theme, and the friendliest to colour-blind players.

See It in Action

The Käsekästchen home screen No ads. Ever.
A game in progress on the Exercise Book theme Hand-drawn strokes
The end screen of a finished 5 by 5 game A full sheet, 5×5
The same game on the Blueprint dark theme Blueprint, in the dark
The stats screen showing games played and win rates Stats, kept on device

Scroll for more

No ads. No analytics. No account. No network for gameplay. App Store privacy label: Data Not Collected. Käsekästchen works completely offline.

Free, and Free of Tricks

The whole game is free. The tip is a tip — it unlocks nothing.

Supporter tip

€2.99
  • One-time, entirely optional
  • Unlocks nothing — on purpose
  • Changes nothing about the game
  • Just support for an indie developer

Ready to Draw?

Free. No ads. No account. Just a squared sheet of paper and someone to beat.

Download on the App Store
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