Most Shopify promo tools either just add discount codes or just schedule theme changes — not both, and none of them handle reverting a sale price back to the exact number you started with. PromoOS does: schedule a sale, code, BOGO, or free-shipping promo, and it deploys AND reverts automatically, with built-in conflict detection so two discounts never silently stack. Every promo also tracks its own revenue — no guessing which sale actually worked