This is a really neat app. You essentially drag nodes (a node’s color represents it’s note) onto the screen and distance them from the generating node to adjust it’s timing. You can also jam along using the MorphWiz like instrument in the background.
Both versions of the app support Virtual MIDI, so you can send the notes played in NodeBeat to other apps to use their sounds.
NodeBeat on the 
NodeBeat HD on the
