Develop Classified Ads Mobile app - IOS and Android

Hello to everyone. We need someone who can create mobile apps for us.. we have a website as a reference and from them we need to follow their functionality and develop mobile apps only and in a short future we can check for website development too. - The website general requirements : 1. register users - Private - Business - Can be registered as private user - Can be registered as Store or business NOTE : app should offer register by facebook, google, 2. Send messages (This will be included as "ask seller" on all view pages ) 3. Notification system (User dashboard) 4. Offer module ( as notification system when a buyer gives any offer on the price ) 5. Search module, users can search for any post. 6. User dashboard - ( Here users can check what they have listed for sale, modify them , or delete anytime ) 7. Categories - List all available categories - This site support 3 type of level categories, - Category , sub category , Sub of sub category. - Users can post these type of ads. 1. Post Vehicles as classified ads - unique adding form. 2. Post Products as classified ads . - unique adding form. 3. Post Properties as classified ads . - unique adding form. So for these 3 points we need to create view pages as well. 1. View or search for all available vehicles. - Including Sorting functionalities 2. View or search for all available products. - Including sorting functionalities. 3. View or search for all available properties. - Including sorting functionalities. Stores (Business users) as mentioned, they should be listed in a special page that will list all available stores , after clicking on a store app should list all their products available for sale.