Design an App Mockup

I need a nice design for the concept listed below. Its a Nicely design web interface and a android/mobile/tablet app. No coding needed. I already have a logo Name of App: Gas Auth Two sections Web Interface Vendors a. Name of Vendor b. Address of Vendor c. Vendor Password Employees a. Name of Employee b. Department Employee is assigned too. Vehicle a. License Plate of Vehicle b. Employee Authorized to drive the vehicle c. Type of Vehicle: Government, Rental, Private, Other d. Monhtly Gas Budget per vehicle* Reports a. Gas Purchased per Department b. Gas Purchased per Employee c. Gas Purchased per Type of vehicle d. The ability to see receipts taken by app. Android App A. Gas a. Step 1. Select Vendor. b. Step 2. Enter License Plate Number. (App checks database to see if this car is authorized to get gas, authorization of driver and available budget) c. Step 3. Select Gas or Diesel d. Step 4 Enter amount required. (Confirm that amount required is within budget) e. Step 5 Ask driver to sign f. Step 6 Take a picture of the receipt given to the driver. g. Store picture along with record. *App should have the ability to work offline and then update when there is internet access *Each Vechile is allowed a specific gas amount per month.