Mobile app

Need mobile have to make order item to purchace for my shop , for own use , I need 2 button , 1 Main Catalogy 2. Item under main catagory , example spices will be main category and I need all spices names under main catagory , when my staff choose item which is sold out in the shop and submit I can print report , once submit report cannot submit any other report untill delete the old depart by admin , staff only can edit the report