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CreaseForge

Fold the paper and you’ve made a mirror. The crease is a line of reflection — that’s the whole trick.

One idea folds all of origami into maths

Every fold is a reflection across the crease. Whatever sits on one side of the fold lands as its exact mirror image on the other — so where a corner goes isn’t a guess, it’s a reflection you can compute.

↔️ Fold across a line. A dot 3 units left of the crease lands 3 units to the right. Left/right, top/bottom, or the diagonal — the crease is always the mirror.
📐 Fold an angle in half. Match one edge onto the other and the crease bisects the angle exactly — halfway between 20° and 80° is 50°, no protractor needed.
🔷 Count the symmetry. A square lands on itself along 4 folds, a triangle 3, a hexagon 6 — a regular shape has as many symmetry folds as it has sides.

Everything runs on your device — no internet, no accounts.

Meet the crew — the folds that make a mirror

Mira is the crease itself — a line of reflection that flips one half of the paper onto the other.
Valley and Mountain are the two ways to fold, but both are the same mirror seen from opposite sides.
Axis (mentor) counts a shape’s symmetry folds and reminds the crew a regular n-gon always has exactly n.
Bisect matches one edge onto another to split an angle exactly in half — geometry a ruler can only approximate.

Painted friends + storybooks are coming soon.