Building a Smile app just takes a few steps.
Login to your developer account. From there, you can create new apps and manage app settings.
Smile apps allow you to add features and functionality to Smile that is specific to your product. For example, adding a new activity type for product reviews, or creating webhooks to sync customer points data with your product.
There are two areas of functionality you can add to your app:
Create a new activity type to allow merchants to reward their customers in more ways
Create a webhook to notify your application any time a customer is updated on a Smile account