Users can upload any music file they own — from iTunes libraries, Windows Media Player, or file folders– to Music. Music stores all the songs, albums and playlists completely in the cloud, so with the Music Android application, a user’s Google music library is automatically synced across all of his or her devices. The app automatically caches the most recently listened-to songs so they can be accessed without an Internet connection.

The app is currently available by invitation only to users in the United States, Joyce said, and will be free for as long as it’s in beta. The company did not give any further information on any future pricing plans.

Although the Music application stores music and does not sell it, Tuesday’s launch still puts Google more directly into a space currently dominated by Apple. Joyce acknowledged the competition during his keynote presentation with a hint of snark, referring to Google Music’s “Instant Mix” playlist-creating feature as a “truly ingenious” feature– an obvious wink to iTunes’ “Genius” automatic playlist creator. source