As Apple finally enters the on-demand music streaming market, established services are making double- and triple-digit gains in users, according to a study by Nielsen.
In the last year, the fastest grower was Clear Channel’s iHeartRadio, which more than doubled its users, Nielsen said.
Spotify, which launched in the U.S. in 2011, had the second-fastest growth, with a 91% user increase since April 2012.
Slacker Radio’s user base grew 84%, while Pandora’s rose 71%.
Clear Channel said in May that iHeartRadio has surpassed 30 million registered users, compared with Pandora’s 200 million registered users and 70 million active users. Spotify has more than 24 million active users, according to its website.
One of Pandora’s advantages is that people who use other services also often use Pandora, according to Nielsen's study. For example, 34% of Spotify users also use Pandora. So do 32% of iHeartRadio users.