Desarrollar software

I want a app for mobile devices, iOS and android. The app should be similar to the app of Groupon, where deals or offers are listed according to the location of the mobile device(nearest first). (The main screen should be either the list view or the map view) You should also have a tab to see a map and see the location of the offers, being able to tap on them to see the offer info. In the above named list view of the offers, each offer should have a image background a offer title, a field with an integer which shows how many offers are left (in case there are no more deals available it should say sold out.)and a field with the original price crossed out and the deal price without crossing. Once you tap on the offer the offer profile view is showed, it is the same if you tab it on the map [login to view URL] this profile of the offer you should see as before at the top a field with an image and the other two fields for the price and the amount of offers that are left, but in addition underneath you should see a brief offer description, the location and the possibility to tab on the location and get a route from your actual position to the offer location as well as a switch between two options(the option you choose will be saved for the order)and a tab to buy the offer where you would be redirected to a checkout process either PayPal or credit/debit card. The app should also have a screen for login at the beginning of the app for users and at the bottom for businesses. The app should be manageable from the app, for me the admin as for each merchant inside the app. This means that the offers listed are managed each one individually by each merchant (each merchant is only able to publish one deal)being able to modify it in real time, uploading another image for the offer, another price, availability. The admin is able to see the list of users in the app, how many transactions have been made, the different offers from each merchant and modify them, send push notifications to the app users in real time or programmed, as well as creating new merchant user accounts. When an order is made by a customer, the merchant receives a push notification with the users info and order info as well as an email. Also the user should recieve a email with order id and confirmation to show it in the business when he redeems the offer. I attach images of how the app should look like for the user. I will provide the user interface.