Slacker, the San Diego-based online music provider, said since the relaunch of the company’s digital service in February it’s added six million new listeners, including more than half using mobile devices.

CEO Jim Cady said the results of the relaunch have been positive.

“Millions of new people are turning into Slacker, they’re spending more time listening, and our paid subscriber base is growing fast,” he said.

The company said 100,000 paid subscribers joined the service since February.

It launched its digital music service in 2010, and has doubled its business every year, the company said.

It’s also recently expanded its operations, opening offices in Palo Alto and New York. 

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