Build an E-Commerce App in 30 Minutes with Codular

Build a Shopping App - Step by Step

In this tutorial, we'll build a complete e-commerce app with:

• Product listing with images and prices
• Shopping cart with quantity controls
• Coupon code support
• Order tracking

Step 1: Create Variables

Create these variables in your project:

• products (array): Your product catalog
• cart (array): Items in the shopping cart
• cartCount (number): Number of items in cart
• couponCode (string): Entered coupon code
• orderStatus (number): Current order step

Step 2: Products Screen

• Add a Container as the root
• Add a header with Text ("Our Shop") and CartBadge (variableId: cartCount)
• Add a List bound to "products" variable
• Inside the list pattern, use ProductCard with:

- title, price, image bound to item properties

- onAddToCart event → flow that pushes item to cart array

event → arrayPush(variableId: "cart", sourceVariableId: "currentItem") → arrayLength(variableId: "cart", resultVariableId: "cartCount") → showToast("Added to cart!")

Step 3: Cart Screen

• Add a List bound to "cart" variable
• For each item, show the product name and a QuantityStepper
• Add a CouponInput at the bottom (onApply → validate coupon flow)
• Add a PriceTag showing the total
• Add a "Checkout" Button

event → showConfirm("Place Order?", "Total: $99.00") → [true] setVariable(orderStatus, 0) → navigate(order-tracking) → [false] (nothing)

Step 4: Order Tracking Screen

• Add an OrderTracker component with:

- steps: "Ordered, Confirmed, Shipped, Out for Delivery, Delivered"

- variableId: "orderStatus"

• Add a "Track Order" button that increments orderStatus

event → mathOperation(add, variableIdA: "orderStatus", valueB: "1", resultVariableId: "orderStatus")

Step 5: Polish & Build

• Add a theme with your brand colors
• Add navigation between screens
• Test with Preview mode
• Build your APK!

That's it! A complete shopping app built entirely without code. Start building at mobcraft.in.