SPREE is a firebase mobile point-of-sale (POS) system based on Android devices that includes BarCode QR Scan, Retail and Staff Management. It allows you to easily manage stores, customers and suppliers. This app let you to build mobile POS app for you store or enterprise. With SPREE, stock management will be as easy as a button away. Make reservations and receive stocks from your local suppliers easily. Send emails, text messages and calls from the application to your customers, staff and suppliers.