QuiltMath: Quilting Calculator

QuiltMath does the quilt-shop arithmetic so you can cut with confidence.

21 calculators, free: binding, backing, batting and yardage; half-square, quarter-square and half-rectangle triangles; Flying Geese, setting triangles and square in a square; borders and sashing; pieces and strips from fabric; blocks to quilt size; T-shirt and rag quilts; a quilt shopping list; and a unit converter that reads fractions or decimals.

Pro adds precut yield from charm packs and jelly rolls, cost and pricing with longarm rates, reference tables, cutting diagrams laid out to spare fabric, export to PDF or a picture, a fabric stash and a project journal, and shrinkage and selvage allowances.

Works entirely offline. No account, no sign-in, no cloud — nothing you calculate leaves the phone. One purchase, no subscription. 17 languages. Every figure is a minimum you can actually cut, so add 5-10% for insurance as you would with any pattern.

Export is a PDF or picture of your own maths, sent through the system share sheet. QuiltMath does not read your photo library. Project names and journal notes stay on the phone unless you export that page. There is no in-app rating or review of other people.

Recent changes:
Stability fix: cold-start crash on newer Android (WorkManager / ads SDK).
Please update for a reliable launch.