Following are the stages for Shopify App Development:
Step 1: Embed your app into the Shopify forum.
Step 2: Build your user interface utilizing Polaris.
Step 3: Utilize the REST API or the GraphQL Admin API to enter and configure the GraphQL Admin API.
Step 4: Connect the Billing API. This step is one of the most crucial steps of Shopify app development.
Step 5: Webhooks or EventBridge can be utilized to apprehend and respond to events.