Online music-streaming site Rdio has launched a six-month free trial in a bid to entice Canadian consumers to pay for their regular service.

The site, which debuted in the United States in August 2010, normally costs between $5 and $23 a month, depending on where you listen and how many people use the service.

Rdio is a legal music streaming website, competing with Spotify and Pandora in the U.S. There are no ads.

The free trial lasts for six months, depending on how many songs are used. A meter at the top of user profile pages lets people know how much free music they have remaining each month.

Rdio’s library of 18 million songs is available through the web and on desktop apps for Mac and Windows.  If the subscription runs out early, Rdio is hoping users will switch to one of its paid plans.

Plan options include:

  • Rdio Web: $4.99 a month. Unlimited web streaming.
  • Rdio Unlimited: $9.99 a month. Unlimited web and mobile streaming, as well as wireless syncing to listen offline.
  • Rdio Unlimited Family: $17.99 a month for two people, $22.99 a month for 3 people. Unlimited web and mobile streaming, as well as wireless syncing to listen offline.

Rdio also launched free access in the United Kingdom, Australia, Belgium, Denmark, Estonia, Finland, France, Netherlands, New Zealand, Norway, Portugal, Spain, and Sweden.

Rdio was founded by Janus Friis, one of the creators behind Skype.