You can download the app directly on your Windows Phone device through the Windows Phone Marketplace or by using the link which follows:
Spotify for Windows Phone has the following features:
- Search, browse & play millions of tracks.
- Explore & play your friends' playlists, top artists and tracks.
- Stream over WiFi or 2.5/3G - all your existing playlists are available.
- Offline playlists - play your music without an internet connection.
- On-the-fly sync - every track you add to a playlist appears on mobile and computer.
- What's New view.
- Receive music from friends via the inbox.
- Starred tracks - tag all your favorites into a special list.