I need an Android & iOS app with an admin panel

I need an android and iOS app that will have the followings. My website is under development and the site will be launched by Monday next week and I need the apps ready within 15-20 days : 1. Sign-up process, 2. Shopping type selection, 3. Category-wise search, 4. Product listing, 5. Payment gateway integration, 6. Checkout, 7. Delivery tracking, 8. Complete Admin panel functionality, 9. Category and product add, 10. Product and price management, 11. User controls, 12. History management. For better understanding of my project you can have a look at this link [login to view URL] . My app will be hybrid and will be on both Android & iOS and it'll have a decentralized admin panel (app or web based app). That admin panel can control, manage and monitor all the customers and their orders. Please note that after placing the order both me and the customer will be notified via an-email and before placing the order the customer will be given an option to choose an order pickup location within a specific area limit (say 20 miles). To know how the app will be you can have a look at the attachment but remember this is just a simple mock-up and is not the app interface, design the app keeping the website's color combination and texts. I need the app ASAP and only experienced developers are needed for this one, also I will have more modifications in the app within 6 months this is just the first phase there are 6 more phases in future, so make sure to do the coding in such a way that you can change/modify it later, because I'll hire you next time.