Pinterest has just released version 4.0 for iOS, and while it doesn't come with another big feature like the addition of private messaging from August, it dresses up the app in a simpler interface. The fresh, minimal interface boasts bigger images and a cleaner description section underneath the pics. According to its developers, they also gave the app a boost so it launches more quickly when you fire it up, and we did notice that starting Pinterest on the iPhone is now significantly faster. Finally, you'll find buttons somewhere near the top of your profile page, which will let you upload new pins or search through old ones. In Pinterest's announcement post, software engineer Steven Ramkumar said the company's merely bringing these changes to iOS first, so other platforms will eventually get the update in the future.