Attach shows merchant-selected upsell and cross-sell products across the buying journey — on product pages, in the cart, and after checkout at post-purchase. You choose exactly which products each one shows, with a variant selector and compare-at pricing, so shoppers see relevant, complementary items rather than generic suggestions. The post-purchase step adds an accepted item to the existing order in one click, with no re-entered payment and no second order. When no product is configured for a

• Upsells and cross-sells on product pages, cart, and post-purchase
• One-click post-purchase add to the existing order, with no re-payment
• Pick the exact products shown in each upsell, with a variant selector
• Analytics per surface and per upsell: impressions, accepts, revenue
• Theme-native — loads only on the surfaces where it runs, no heavy scripts