New: the Patterns section. Full-scale flat patterns for square-to-round
transitions — laid out, dimensioned, ready to mark and cut. Preview a worked
sample free; the Pro unlock (one purchase, no subscription, works offline) rolls
out shortly.

The free calculators stay free and stay uncapped. They now carry a banner at the
bottom of the screen, and Pro will remove it for good. A banner never blocks a
calculation — no signal, no banner, the tool just works.