What's new in Loopy and Loopy HD:
Loopy now supports Ableton Link (http://ableton.com/link), a new technology that synchronises beat, phase and tempo. It works between Ableton Live and Link-enabled iOS apps over a wireless network, or iOS apps on the same device. Just turn it on in Settings to get started!
Also new in Loopy 1.5: Reverb FX! Everybody likes reverb. Find it in Settings. Consider it a very, very tiny taste of things to come in Loopy Masterpiece Edition (follow development @ masterpieceedition.tumblr.com).
Also, non-destructive time stretching: after changing the tempo, you'll be able to go back to the original, un-scaled and full-quality audio any time. Look for the white bars on the tempo slider.
Loopy HD is also slightly reduced in price from $4.99 to $3.99