Set up "buy more, save more" tiers or "these three together, for less" bundles without scripts that rewrite the cart. Tierwise applies every discount through a Shopify discount function, so the total is worked out at checkout where the order is made. A product-page block shows each tier's discounted total before the shopper adds to cart, using the same arithmetic as checkout. Each order that used a discount is recorded, so you see what every tier and bundle sold.

• Quantity breaks with up to 10 tiers, percentage or fixed amount off
• Bundles of 2 to 5 products, discounted on every complete set
• Discounts applied at Shopify checkout, with no duplicate products or codes
• Product-page block shows each tier's discounted total before add to cart
• Revenue, orders, units and discount given for each tier and bundle