Music streaming service Napster has expanded its offering to include Apple's iPhone and handsets running Google Android.

Napster Unlimited plus Mobile is priced at £10 per month and allows users to search and stream tracks from its 15 million-strong catalogue using their handset's 3G and Wi-Fi connection when on the go, as well as on their PC via their broadband connection. In a move similar to rival Spotify, Napster is also giving users the ability to access music on their handset when offline as well. iPhone and Android users can listen to their 100 most recently played tracks when they're not in range of a connection.

"Napster strives to offer music lovers the opportunity to listen to music without barriers and with complete freedom, empowering users to take the music they love and discover on the move and access via multiple platforms," said Thorsten Schliesche, Vice President of Sales and Marketing in Europe, at Napster.

"Napster Unlimited plus Mobile is the culmination of listening to our members' feedback and providing what they have asked us for. We are proud that Napster's music catalogue of 15 million tracks is one of the largest available and can now truly be accessed anywhere - complete with the tools to make it easy and fun to navigate such a large and diverse catalogue of continually expanding music."

Napster's Unlimited plus Mobile app is available to download from iTunes and the Android market now.