BeatSpiral is a Universal sample performance instrument from Xylio, makers of Future DJ.

We've seen a few sample slicer apps, but most stick to the conventional 16-step sequencers of hardware samplers. This looks pretty damn cool, using the touch interface to control the sequencer in a more dynamic way.

iTunes Description: Chop samples, make beats and perform them live. Choose from the included library or import your own. Create new sequences by rearranging and looping sample slices

Hold the wave stripes at different locations to play slices, slide out to record

2 Waves on the left get recorded to one track, the others to the second

Different loop regions on each track, change their length, copy and erase

Mute pads for temporary silencing, erasing track content and deactivating

Eject buttons for selecting sample files and setting volume and panning

User sample import via iTunes File Sharing (mp3, wav, aiff, m4a)

Animated metronome shows tempo controls (20-200 BPM) with Tap Tempo

Zoom, Undo and Rotate tracks

Audio engine featuring high quality interpolation and low latency

Sample library and handy user guide to get you started

Crossfader

Autosave

Not mentioned in those features are how you import your own samples, record nor export.

For $2 though this looks pretty damn fun, as evidenced by their introductory video.