Hi,
Yes, you can use an API to create a customer app where a customer's data is available to that customer. An API (Application Programming Interface) allows you to interact with an external service, such as a database, and retrieve or modify data in a secure manner. By integrating an API into your customer app, you can retrieve customer data stored in a backend system and present it to the customer in a user-friendly interface. The exact implementation will depend on the specific API and the technology stack you are using.