Even if you're not paying for Rdio's streaming music service, you can now get your groove on with the mobile app. In an effort to attract more users from Spotify and Pandora, Rdio has made its personalized radio streaming service free in the app. The new feature goes live later today with an app update in Google Play.

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Rdio has 10 different station types, including those based on artists, genres, songs, and the hyper-personal "You FM." There's no offline caching, and you can't queue up specific songs, but Rdio does have over 20 million tracks to pull into the radio stations. If you want to move beyond the radio stations, Rdio is $9.99 per month.

Both paid and free users can also enjoy two new radio-oriented features. First, there are new stations based on albums and playlists. You can also share your stations with friends now. The free radio deal will be available in the US, Canada, and Australia.

[Rdio Blog]