iDoughMath: Change one amount. Every ingredient follows.

Hi Product Hunt! I'm a home baker, and iDoughMath is the app I wanted on my own kitchen counter. My recipes came from everywhere: websites, YouTube, Instagram captions, my family's old notebooks. And every time I baked, I was doing sums: only 180 g of butter left, a square tin instead of a round one, out of eggs, a friend who's vegan. I'd scribble numbers on the back of the recipe and hope. So with Hanamori Labs I built iDoughMath. Paste a recipe or a link, change one amount, and every other ingredient follows. Pick your tin and the amounts scale to fit. Out of something? It shows what to use instead and says honestly how the bake will change. Grams come first, cups when you want them, with the US, metric and Japanese cup kept apart. There's a sourdough planner for feeds and bake times too. For bakers who sell, Plus works out what each bake costs and your profit per slice, and Pro adds orders, invoices and a pop-up market counter. It's free to start, with up to 20 recipes saved, and every Plus and Pro plan begins with a 7-day free trial. No ads. It's on iPhone and Android, in English, 繁體中文, 简体中文, 日本語, Português and Bahasa Melayu. I'd love your feedback: what's the baking sum you always get stuck on?