I like the site so far, one of the things that annoyed me is when your choosing to buy or sell a house. You should add a hover effect so the user knows what they're about to click.
I think you should program for iOS first. Think about a company like Instagram, they made the app for only iPhone users, then it became popular. Once the app was released for Android, millions of people downloaded it in less than 24 hours. In my opinion iOS apps gets more attention then Android apps.
Android apps aren't a bad place to start though, there are some really good Android apps I use everyday.