Most hydration calculators treat starter as if it were water. It isn't — a 100% hydration levain is half flour, half water, and that changes your dough math. This app computes true hydration (levain included), baker's percentages for every ingredient, and levain builds, and saves recipes with a per-bake journal. Free, offline, no account, 14 languages. Ad-supported on Android — no subscription, no IAP. Early release, feedback welcome!