Quantity-break discounts, made simple. Pick a product, define quantity thresholds and set per-unit tiers — TierUp compiles the rule, writes it to a product metafield, and activates the automatic discount. At checkout, a native Shopify Function applies the correct tier without codes, without draft orders, and without breaking GA4 or Meta Pixel attribution. On the product page, a drop-in theme block shows a "buy more, save more" table and a live "Buy X to save Y per unit" nudge.

• Set per-unit tiers per product — 1 for 50, 3 for 45, 6 for 40
• Native Shopify Function applies the discount at checkout automatically
• Product-page tier table + live "Buy X to save Y per unit" nudge
• Drop-in theme app block — no code, no theme file edits
• Preserves accelerated checkouts, GA4, and Meta Pixel attribution