Shazam has launched a completely revamped version of its iPad app, Digital Spy said.

The music identification service now has an auto-tagging feature that automatically determines what music, TV show or advertisement is playing without having to manually tag it.

The redesigned homescreen shows what your Facebook friends have been watching and listening to, as well as listing charts based on what's popular in specific areas.

"We have seen triple-digit growth over the last year for our existing iPad app, even though we haven't really aggressively promoted it," Shazam's executive vice president of marketing David Jones told The Guardian.

"We've been testing it extensively to see if it drains the battery when running in the background, but the iPad can go for a couple of days with this running. It doesn't change how often you have to plug in, which is very important.

"For the time being it's select television shows in the UK, but over time we want to expand that to every channel.

"Music is still our bread and butter, but more than 10m people have Shazammed television in the last year. Those are real and meaningful numbers for networks, brands and advertising agencies."

The company, which says it is "respectful" of the "goldmine of data" it collects, will release iPhone and Android versions of the new app later this year.