Rdio 2.3.3. for iOS (app icon, small)

Rdio has updated its free radio streaming app for the iPhone and iPad with some bug fixes and a brand new, albeit long overdue, feature: push notifications. That’s right, you can now elect to received push alerts for various social activities going on in your stream.

The Internet radio app offers a catalog of 25 million songs and now you can get notified when someone shares a song with you, follows you on the service, subscribes to your playlist and more.

Push alerts settings are granular so you can choose to receive alerts for specific events and mute alerts for the others. For example, you could tell Rdio to send notifications to your device only for new songs shared with you…

In addition to push alerts, the new Rdio version 2.5.9 includes various user interface enhancements and minor bug fixes.

Rdio 2.5.3 for iOS (iPhone screenshot 002)Rdio 2.5.3 for iOS (iPhone screenshot 001)

Here’s the full changelog:

• Push Notifications. Get notified on your mobile device about the activities of your choice, such as music shared with you, new followers, subscribers to your playlists and more
• Various UI improvements and minor bug fixes

Rdio back in March received support for Google’s $35 Chromecast HDMI dongle.

Updates in months past have brought out various improvements, such as in-app playlist editing and reviews, Sleep Timer and revamped user profiles, streaming support in two dozen new countries, Shazam integration and what not.

You can download Rdio free in the App Store.

The universal app requires an iPhone, iPod touch or iPad running iOS 6.0 or later, plus a Rdio subscription – starting at seven bucks per month for unlimited listening everywhere.

Rdio also offers a 14-day free trial and various Family plans.