NEW YORK ( TheStreet) -- Just ahead of Apple's ( AAPL) big WWDC 2011 confab, the company's App Store hit the 400,000 app milestone. Here are five new -- or newly updated -- iPhone apps to try. Do@Cost: Free Launched at the TechCrunch Disrupt event last month in New York City, Do@ is a search app that trawls your keyword search only within mobile apps -- not the entire Web. The result is more relevant results in less time.
Say, for example, you're looking for a sushi restaurant. Type in "sushi" and Do@ will return nearby restaurant results from a number of apps that specialize in cuisine reviews -- in our case, Yelp, Foodspotting, Zagat, Foursquare and Chowhound, etc. Besides food recommendations, Do@ can also answer queries related to movies (using apps like Flixster), music, weather and sports. We were impressed with the app's interface, which while stark, is incredibly simple to use: Once you hit the search button, it displays results within third-party apps. If you don't have the particular app installed on your phone, Do@ directs you automatically to the Web site. Do@, based in Israel, announced $7 million in funding from Draper Fisher Jurvetson last month.