titanium iphone/ipad/android app (shopper info)

write an iOS and android app using titanium. The app is for promoting product sales by 1. take photos on product 2. write description 3. select the product type 4. select the location Users can subscribe some product types and locations. When some users add new product with the subscribed product types and locations, users will receive push notification and then they can send message with the message sender and message sender can send back message to them.