UR: Limited‑Time Sale Schedule

The app is presented as a scheduling and availability control tool for Shopify merchants, focused on running time-based product sales with precision. It lets merchants set start and end dates for individual products or groups of items, automatically updates purchase button text before, during, and after the sale, and adds checkout-level validation to prevent purchases outside the allowed period. This makes it useful for launches, preorders, campaigns, and seasonal promotions where controlled timing matters.