Sony is taking on Spotify by releasing its first Music Unlimited app for iPhone this week.
The Music Unlimited app will launch by the end of the week after debuting more than 12 months ago on Sony devices.
Other devices that currently feature Music Unlimited include Sony Bravia TVs, PlayStation 3, PlayStation Vita, and Android tablets, and smartphones.
In January 2012, Sony said it had 1 million active Music Unlimited customers, while Spotify is estimated to have up to 18 million monthly users. Both Spotify and Music Unlimited lay claim to libraries of more than 15 million songs.
At CES, Sony Network Entertainment President Tim Schaaff said cloud-based services are still "in an early stage of competition," and that Sony is "getting its skin in the game."