I have been playing with iOS 7 and there is a lot of new things in it. For example:
Mail has new Smart Mailboxes that can be helpful in filtering email: you can access them in the Mail app, just tap on the Edit button when you’re in the mailbox view.
The Compass app has added a level feature . Just swipe to the left when you launch the Compass app to find it.
The Camera app, as before, lets you hold it in landscape mode and use the Volume Up button to take the picture. Now, you can also hold the Volume Up button to have your iPhone autofocus the scene , without having to tap on the screen. You can also apply filters directly in the camera!