This project is an iOS application called Inven-Saler which build by Swift programming language using Xcode. In this application, user can manage their store inventory using this application. Users can use the bar code scanning function to sell commodities efficiently. It will be using Firebase to manage user data and give a basic selling program that allows user to sell their commodities and get the financial report by this application. Also, this application can generate a financial summary which may help user knows their store sales. Inven-saler is committed to solving the inventory management problem of small merchants.