Calabarock (App Store link) is a free internet-enabled multi-track audio recorder for the iPhone.

When you create a track in Calabarock, it’s available almost instantly in MP3 format on calabarock.com for others to hear.

The new track is also available instantly for other musicians to play on top of, just as if you were in the studio laying down one track at a time on a multi-track recorder.

If you’ve used Calabarock, leave a comment with your thoughts!

NOTE: 3G network access is great for browsing and listening to Calabarock tracks, but WiFi access is recommended (for speed purposes) when recording.