• First things first, sign up or log in to your Adalo account.
• Head over to your existing project or, if you need to, create a new one.

• If you don’t have a Stripe account yet, go ahead and sign up for one.
• Complete the verification process that Stripe requires.
• Grab your Stripe API keys (both publishable and secret keys) from the API section of your Stripe dashboard.

• In your Adalo project, navigate to the Settings, then find the Payments tab.
• Enable Stripe integration by entering your Stripe API keys.
• Choose your preferred currency for transactions.

• In your Stripe dashboard, go to the Products section.
• Create new products for each in-app purchase item you want to offer.
• Fill in the product details like name, pricing, and any other necessary information.

• In Adalo, create the screen where users will select in-app purchases.
• Add a button component for each in-app purchase option.
• Set up custom actions for these buttons to initiate a purchase.
• Choose "Add Action" > "Link" > “Custom Action”.
• Select Stripe as the integration and configure it to charge the user based on the product they chose.

• Set up a success screen that users will be redirected to after a successful purchase.
• Use the custom actions to update the user’s data (e.g., unlocking features) upon successful payment.

• Test the entire purchase flow in Adalo using test card numbers provided by Stripe.
• Make sure transactions are being processed correctly and that users are receiving the correct items or features.

• Once testing is complete and everything is working as expected, publish your app.
• Regularly monitor your Stripe Dashboard for transactions and potential issues.

Each step needs to be carefully followed to ensure a seamless in-app purchase experience for users.