Upsell

Offer complementary products the moment a customer adds to cart — without fighting your theme's own cart UI.

• Works on any theme. Cart UI is detected by capability, not by a theme allowlist, with a generic fallback.
• No latency at the click. Rules are published to an app-owned metafield and read straight out of the page.
• Real discounts. A cart discount function prices the accepted offer, driven by server-side config.