TopTrade is a global mobile application for easy selling and buying products. With TopTrade, the buyer and seller can feel free to communicate together to get the best prices through a real time chat tool and features for processing shopping carts for each shop built in the application. The sellers can add any additional fees such as discount fee, shipping fee, etc. for each order. Furthermore, TopTrade provides features for sellers to manage shopping carts and orders of customers; update shipping and payment status as well as manage payment proofs submitted by customers.