Of course I'm biased but I've spent some time with the new Windermere iPhone app and it offers lots of tools that make home searching at least as easy as on a desktop, and in some ways better.
Just one way it's better is that after you've found several homes you want to drive by, it will optimize the route for you and display it in either map or list (with turn by turn directions) form. Saves you time and gas, too. I could go on too long, but download and then tell me what you think. Search for the "Windermere Real Estate Search App" (that will keep you from getting a similar one that's just for Spokane, WA)
iPhone only, so far 🙁