We've seen just about everything in the form of an app lately; and the addition of Jamie Oliver really doesn't take us by surprise. We use recipe app's on our iPhone each and every time we cook (we're trying to expand our culinary horizons).
20 Minute Meals is not a rip off of Rachel Ray's 30 Minute Meals; it's actually better. 20 Minute Meals is a quick cooks online bible so to speak. The app boasts over 50 meals that can be prepared in guess how many minutes? 20! If you only like these meals because it's Jamie Oliver you're in luck - there's over 90 minutes of video.
The cooking app allows for you to create a shopping list right on your phone. Making shopping extremely convenient because you no longer have to try to remember each and every ingredient; let alone having to actually write them down. Also, Jaime offers tips that you can hear during each recipe that you view. Think of it as having your own personal cooking tutorial. Much like Take Home Chef (but not as cute).
20 Minute Meals is available in iTunes for $8.