You need to use Amazon Seller App to open a store on Amazon. Amazon Seller App is a convenient application that can freely manage and monitor your online store. It can help you update inventory, manage orders, and track sales. In addition, the application also has real-time sales data and reporting functions to help you better understand the performance of your store and your buyers. Amazon Seller App is seamlessly integrated with other services of the Amazon platform to make your business more efficient. At the same time, the application also provides many tools and resources to help you sell online more successfully, such as product listings, advertising, and promotions. Therefore, using Amazon Seller App is very important and beneficial for opening a store on Amazon.