Tangent

Write the curve. Light the dark.

A pixel-art puzzle game for iPhone where you write a short equation and watch a spark trace it through the dark.

30 levels · plays offline · no ads, no subscription

You write it

Type an equation on a keyboard built for maths. The path is exactly the graph of what you wrote - never bounced or nudged.

Nothing punishes you

Unlimited attempts, a free preview of every curve, no timers and no lives.

Yours, offline

One purchase, the whole game. No account, no tracking, nothing leaves your device.