JakubekSTUDIO

The app

Foldwise

Eighteen models, one crease at a time.

Foldwise teaches eighteen traditional origami models the way a patient teacher would: one crease at a time, with a diagram for every single step. Nothing in it is a photograph or a scanned page.

• Library
• Steps
• Reference

Drawn, not photographed

Every diagram is real geometry

Each step is an actual polygon, folded by reflecting part of the sheet across the fold line. Tap animate and you watch the flap swing over and land exactly where the next picture says it should. Slow it down, speed it up, loop it until it makes sense.

Each model tells you what it is, which base it starts from, how many folds it takes and what difficulty it sits at. Star the ones you love, tick off the ones you have learned, and the progress page keeps count by difficulty.

The reference

Learn the marks once, read any book

A reference page explains every mark diagrams use anywhere in the world, so once you have them here, an origami book from any country becomes readable.

• Valley fold
• Mountain fold
• Fold and unfold
• Turn over
• Rotate
• Existing crease

Pick a paper colour, choose how fast the animation runs, and fold in English or Norwegian. Completely offline: no account, no ads, nothing leaves your phone.

Package com.paperloom.foldwise

Paper is gentle, the tools around it are not. Folding itself is about as safe as a hobby gets, but a sharp crease on dry hands gives a paper cut, and the bone folders, craft knives and cutting mats people reach for to trim a square are not toys. Keep blades away from small children, and keep small finished models away from babies and pets, who will try to eat them. Emergencies in Norway: 113 for an ambulance, 112 for the police.

Working out

Why nobody folds a sheet in half eight times

Halving a sheet does two things at once. The layers double, so the stack grows as 2ⁿ, and the footprint halves, so the sheet shrinks. Somewhere around the seventh fold an A4 page becomes taller than it is wide and simply will not bend. The way past it is to give up on squares and fold one long strip in a single direction, and there is an exact equation for how long that strip must be.

Fold an A4 page in half seven times and the paper left under your thumb is about 4.9 cm² — a square of roughly 2.2 cm — while the stack standing on it is 12.8 mm tall. It is now a block, not a sheet. Along a strip the limit is gentler but merciless in its own way: each further fold costs about four times the paper, so eight folds want 3.5 m, ten want 55 m, and twelve want 879 m of ordinary tissue — which is roughly the length a schoolgirl actually used in 2002, when she both broke the record and derived the equation this page is running.

What is not here: no models, no diagrams, no folding sequences and nothing to learn a crane from. This page folds a blank strip in half and counts, nothing more. The equation assumes a single direction, perfectly round fold ends and paper that never tears, wrinkles or springs back, which is why a real sheet gives up earlier than the arithmetic says.