The paid iPhone App Shazam Encore comes with following additional features as compared to Shazam free App:

• Improved speed performance: making it even quicker for users to tag tracks and learn more about their music.
• Music recommendations: users can discover other music similar to the track that’s been tagged to enhance their music collection and knowledge.
• Find what’s hot and popular: Shazam music charts generated by millions of other Shazamers can be accessed to help users keep up to date with the new tracks and players in the music scene.
• Search music: easily find music by artist, album or track from over 8 million songs.
• Drive and Tag: Shazam automatically enters into car mode when the iPhone is placed in an in-car dock to make it simple to discover what’s playing on the radio even when driving.

You can get all the above features in Shazam Encore for $4.99 from the App Store.

[iTunes Link]