Rdio is the super-stealth streaming music startup from Skype founders Janus Friis and Niklas Zennstrom. While few have actually experienced the service, Music Ally discovered that the company already has an iPhone app. The free — but members-only — iPhone app [iTunes link] was released yesterday and includes a very enticing description that directly attacks Pandora’s () offering with intelligent innuendo.

Rdio’s touted features include on-demand music, unrestricted access, unlimited and collaborative playlists and push notifications for playlist updates.
Here’s what Rdio promises:

“Rdio is like carrying a giant MP3 player in your pocket – you have unlimited and unrestricted access to all the music, and you get to select exactly the song, album or artist you want to hear. And you can skip, pause, fast forward as much as you want.
Build your collection and compose your playlists on rdio.com and listen to them all on the go. Or search for just the right song when you’re out and it will start playing instantly.
- Carry your collection in your pocket
- Build unlimited playlists
- Search the entire Rdio catalog
- Notification when your collaborative playlists are updated”

It’s plausible that the application is just as early first attempt, and was never designed to be exposed to the general public. Still, it exists. If it lives up to its claims, then this could prove to be one killer music app.

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Rdio Screenshots

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