I looked at the Leonard Maltin Movie Guide a couple of years ago, and found it complete and easy to use. Current owners of the US$1.99 app will find a free update today, with more than 300 recent movies added. Other new features are weekly automatic content updates, improved integration with IMDb, and your movie lists (favorites, recommendations, want to see, etc.) are now backed up/restored via Apple's iCloud.
The app has 24,000 film reviews available, and, as before, you can connect to the iTunes Store for a purchase or add a film to your Netflix queue, either disc or instant.
Trailers are attached to many of the entrees, and the app is now optimized for iOS 6 and the iPhone 5.