Draw with equations
Type y = sin(x), x² + y² = 25, or y = 0.5x − 1. The plane updates as you type.
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.
Google Play review pending — install the APK directly from us in the meantime.
Math you can play.
Every level is a tiny physics puzzle. Write equations, watch them become curves, and let gravity do the rest.
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.
Three steps. Endless puzzles.
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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.
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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.
Free to play. Yours to solve.
Direct from us
Download APK
Available now
Soon on
Google Play
In review
Soon on
App Store
Coming soon
Google Play review is pending — install the APK directly while we wait. On Android, you may need to allow installs from your browser the first time.
Contact
Stuck on a level? Found a bug?
We read every email. Bug reports, feature requests, and screenshots of beautiful solutions all welcome.
Email support
support.functionplane@gmail.com