Upsellify displays rule-based related products on the cart page before checkout. It integrates through Theme App Extensions and enables merchants to create rules based on products, tags, types, collections, or cart quantity. The app supports both manual product selection and automated rule conditions, offering flexible configuration and control from the theme editor.

• Flexible Rule Setup: Create rules by product, tag, collection, or quantity.
• Cart Page Display: Show related products before customers proceed to checkout.
• Theme Editor Control: Add and manage the block directly in your theme.
• Manual or Auto Selection: Choose products yourself or use rule-based logic.