Build Mobile App

I want to build a light and simple mobile app for my personal small business as a technician/handy man. People should be able to easily download this app to their mobile phones. Through this app, users should be able to place an order for my service. And when people place the order, I should receive the notification (with details of the order) immediately on the admin side of my own app. Electrician, A/C technician, Plumber, Generator Mechanic, Refrigerator Technician, Others 1. User will place order for service. And order will include: - Type of service provider. This will be a drop box - Location of user - Phone no of user - Email address of user - and a text box, for user to explain problem or complaint 2. Admin will receive notifications of any new order on the admin application on admin mobile. And admin can view full details of order. 3. Admin app must have login and password 4. Also, admin will have a contact list in admin app, that shows the details of service providers under admin's control. Details will include: Name of service provider; Type of service offered; Address; Phone no. Admin will manually add information of service providers (artisans) to the contact list. And for anyone that is added, system will generate a unique ID. NOTE: Application must be light, not more than 2mb. And application must not hang or disturb user's mobile system. IMPORTANT: I want every user (customer's) order to generate a unique order ID or no. And it should also generate date and time stamp. Also I want admin to be able to generate, save, and print reports on/from website. The reports will be simple though. Reports will include: ORDER ANALYSIS - Order ID - Date and Time of order - Name of customer - Address of customer - text box - Customer request summary - text box - Artisan assigned to task (Name) - Artisan assigned to task (ID) - Job completed - drop down (yes/no) - Date of job completion - Calendar - Customer's remarks - Artisan's report - Client service charge - Cost of materials - Cost of transport - Amount payable to artisan FINANCIAL ANALYSIS - Order ID - Artisan ID - Artisan first name - Client service charge - Cost of materials - Cost of transport - Amount payable to artisan