The app is created using HTML5 which makes it compatible with a wide variety of smartphone platforms out there.
The company claims that this service should work on: iOS, Android 2.3+, Blackberry Playbook, and HP TouchPad. And of course, it works fine in a HTML5 capable desktop browser too.
The UI is pretty basic right now. But searching and playing music works. And considering it is free, it would make a lot of their users happy.