Lyrics site MetroLyrics has launched a new iPhone app through its parent company CBS Interactive. The free app went live on Apple’s App Store today. It’s not the first time the company has had an iPhone app – this page on its website details its previous Lite and Pro apps, which have since been removed from the App Store. So what’s new? “Lyric videos, millions of tracks, synchronize lyrics, scrobble to last.fm and much more,” promises the new app’s listing. ”Find lyrics to all your favorite songs, and use the map charts feature (populated by users) to see the most popular songs in your city and around the globe.” It’ll compete with identification apps like Shazam and SoundHound, which have both added lyrics features in recent times.