App development

I need a new app. I need you to design and build a mobile app for my small business. We have business of Pipe fittings such as Pipe, Tee, angle valve in various dimensions. We need a app for creating orders.A customer or a plumber is first made to register by using Name , Mobile and Address. For example if i am plumber and i need 10 ft pipe - 2 no's. I will simply go to app and tap on create order > Pipe > 10Ft. --- 2 no's > send order. The data is real time sent to us and we can view the order and keep the order ready. The dealer comes to shop and collect the order. The purpose of app is to clear the confusion in order and when the same person places order again it's updates under his name and mobile no so all of his order are seen together.