A Shopify app for apparel brands. It builds each style's size curve from demand net of returns, says what to reorder in which sizes, and flags size runs whose core sizes are gone. A size that sold out is counted at the rate it sold while it had stock, not as a size nobody wanted. You set your own supplier lead time, and stock already incoming in Shopify from a purchase order or transfer is subtracted. Read-only: it never writes to your store. $29 a month after a 14-day free trial.