Advilla Android App is used for users to buy and sell their products. Users can register with the app and then they can post their ads through their mobile phones. To post an ad they just have to take a picture of the product, add a product description, set pricing and submit to list for sale. The product will be displayed on the app so other people can see and contact with the seller to buy the product. The role of this app here is to make links between buyers and sellers.