Functions and extensions
Server-side logic Shopify hosts, and UI that lives inside checkout, accounts, the theme and POS.
Discount Functions: custom discount types, tiered and stacked rules
Cart transform and bundle Functions
Checkout validation Functions
Delivery customization: hide, rename and reorder shipping options
Payment customization: hide or reorder payment methods by rule
Order routing location rules and fulfillment constraints
Local pickup options, pickup charges and pickup point Functions
Checkout UI extensions: upsells, custom fields, trust badges, gift messages, delivery instructions
Customer account extensions: order tracking, returns, loyalty, wishlists, subscription management
Theme app extensions: reviews, size charts, banners, timers, chat and PWA embeds
POS UI extensions: tiles and modals for loyalty, custom discounts and warranties
Flow triggers and actions so the app plugs into merchant automations
Web pixels and marketing extensions for tracking and attribution
Analytics extensions that feed app data into merchant reports