Yes! MiiDuu maintains a database of all of your customers for you and allows you to modify it as needed. When a customer creates an account with your store for checkout, he or she will automatically be added to your list of customers. You can access this list by selecting the "Sales" tab and clicking on "Customers". From there you can search/sort your customer database and view contact details for each of your customers. To use the search or sort functions, simply fill in one or more of the boxes at the top of the table and click "Filter".