The three apps have all been updated for iOS 7, with the Podcasts app in particular seeing several new features, including an updated Top Charts section, a new Search tab, and auto-updating so the app will automatically download new episodes even when it isn't open.
All three apps are free downloads from the App Store for the iPhone and iPad.
Podcasts - [App Store]
iTunes Movie Trailers [App Store]
Find My iPhone - [App Store]