Now on Android

Function Plane

A puzzle game about f(x).

Draw curves with equations. Roll a ball through gravity. Collect every star. A minimalist puzzler for anyone who ever loved — or feared — a graphing calculator.

Download APK All platforms

Google Play review pending — install the APK directly from us in the meantime.

10chapters

140+levels

420stars

6 ★

Function Plane

A puzzle game about f(x)

CONTINUE

Pack I · Level 3

How to play

Achievements

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What it is

Math you can play.

Every level is a tiny physics puzzle. Write equations, watch them become curves, and let gravity do the rest.

Draw with equations

Type y = sin(x), x² + y² = 25, or y = 0.5x − 1. The plane updates as you type.

Real physics

The ball obeys gravity, friction and momentum. Curves become tracks. Loops become launchpads.

Press play, watch it run

Tweak, replay, retry. No timers, no penalties — just the satisfaction of a perfectly placed parabola.

10 chapters, 140+ puzzles

From Foundations to Asymptotes. Earn 420 stars across slopes, curves, reflections and more.

Built for thumbs

A custom math keyboard appears when you need it. Symbols, operators, and exponents one tap away.

Quiet, offline, ad-light

Pure puzzle. No accounts required, no constant pings. Play on a plane, on a couch, on a lunch break.

How to play

Three steps. Endless puzzles.

01

Set the goal

Guide the ball from its start position to every star on the plane. All stars must be collected for a level to complete.
02

Write equations

Tap Add and type any equation: y = sin(x), x² + y² = 25, y = 0.5x − 1. The custom math keyboard does the symbols for you.
03

Press Play

The ball drops from its starting position and rolls along your curves. Press Stop any time to reset and adjust.