Buy and Sell ticket Smartphone App - repost

I need a customized smart phone app for iphone, android, ipad. I do not want to give away my app idea. But I can briefly describe what I [login to view URL] the app is opened, the users can search for ads placed by other users. Their location is shown on a map instantly. They can chat or send messages to each other. All app users name, phone number and location is shown at all times. I can give you more information later.