Shazam

Shazam rolls out paid Encore app, changes free app

Macworld:

If you’re already using the free iPhone app, you can still tag songs to your heart’s content with the free version of Shazam. However, new users of the free version are now limited to tagging only five songs a month—as an upside, though, they can post their tags to a Facebook feed, so they got that going for them, which is nice.

A great app, well worth the five bucks to upgrade to the paid version.