Applying Coupon Codes in Adalo

Fixed & Percentage Discounts at Checkout

Purpose

This document explains how to build a coupon code system in Adalo that supports:

• Fixed dollar discounts (e.g. $5 off)

• Percentage-based discounts (e.g. 10% off)

The solution uses native Adalo features only—no custom actions, external APIs, or third-party tools.

---

What This System Supports

• Validating coupon codes entered by users

• Applying discounts dynamically at checkout

• Supporting both fixed and percentage discounts

• Removing or changing coupons without leaving checkout

• Using the same logic across carts, orders, or subscriptions

---

High-Level Flow

1. Coupon codes are stored in a database

2. Users enter a coupon code at checkout

3. Adalo validates the code using a filtered list

4. The discount is calculated and stored on the logged-in user

5. Totals are recalculated automatically

---

Step 1: Create the Coupon Codes Collection

Create a new collection named:

Coupon Codes

Required Properties

Property Name	Type	Purpose
Name	Text	The coupon code users type (case-sensitive)
Amount Off	Number	Dollar amount or decimal percentage
Is Percent Off	True / False	Identifies discount type

---

Coupon Value Rules

Fixed Discount Example

• Coupon: $5OFF

• Amount Off: 5

• Is Percent Off: false

Percentage Discount Example

• Coupon: 10OFF

• Amount Off: 0.1

• Is Percent Off: true

💡 Tip: Store percentages as decimals. 10% = 0.1, 20% = 0.2, etc.

---

---

Step 2: Add Coupon Input to Checkout Screen

On your checkout or payment screen:

Add a Text Input

• Label: Coupon

• Purpose: User enters the coupon code

Add a List

• Collection: Coupon Codes

Filter: Name = Coupon Input

Optional Visibility Rule

Coupon Input is not empty

💡 Why this matters This prevents invalid coupons from appearing and hides UI when no code is entered.

---

---

Step 3: Add an Apply Coupon Button

Inside the Coupon Codes list, add a button:

• Label: Apply

• (Optional) Show the coupon name for testing/debugging

This button will trigger the discount logic.

---

Step 4: Create the Coupon Amount Property

On the Logged-In User collection, create a number property:

Coupon Amount

This property stores the actual dollar value of the discount, regardless of coupon type.

---

Step 5: Fixed Amount Discount Logic

Button Action

Update Logged-In User

Only Run If

Is Percent Off = false

Set Value

Coupon Amount = Amount Off

Example

• $5 off → Coupon Amount = 5

---

Step 6: Percentage Discount Logic

Percentage discounts must be converted into a dollar amount.

Button Action

Update Logged-In User

Only Run If

Is Percent Off = true

Formula

Coupon Amount = Amount Off × Cart Subtotal

Example

$9.00 × 0.1 = $0.90

⚠️ Important Always calculate the percentage against the subtotal before tax.

---

---

Step 7: Show Coupon in Checkout UI

Use conditional visibility to keep the UI clean.

Visibility Rule

Coupon Amount > 0

Display Elements

• Coupon label

• Discount value (shown as a negative amount)

• Optional “Remove Coupon” button

---

Step 8: Remove Coupon Option

Add a small X or Remove Coupon button.

Click Action

Update Logged-In User

Coupon Amount = 0

Visibility Rule

Coupon Amount > 0

This allows users to remove a coupon without restarting checkout.

---

Step 9: Update Subtotal & Total Calculations

Subtotal Formula

Subtotal = Cart Subtotal − Coupon Amount

Total Formula

Total = (Cart Subtotal − Coupon Amount) + Tax

This logic works for:

• Single-item carts

• Multi-item carts

• Add-ons

• Persistent user carts

---

Best Practices & Notes

• Coupon codes are case-sensitive

• Store the coupon value on the logged-in user for easy access

• Admins can manage coupons directly in Adalo

• This pattern works without custom actions or external tools

---

Summary

This setup allows you to:

• Validate coupon codes natively

• Support both fixed and percentage discounts

• Apply coupons dynamically at checkout

• Keep all logic inside Adalo

It’s flexible, scalable, and production-ready.