A fantastic app.

Bebot is quite possibly the best synth in the entire apple store. Even on an iPhone the program is friendly to beginners and robust enough to satisfy all of our inner techno music buffs.

Pros:
Easy to use
Robust with settings on scale and chord.
Plenty of modifiers and extras for the tech savvy

Cons:
Shackled in its simplicity, it is unable to do multi-tracking or dubbing.

Well worth the three dollars!

Phil Haussmann about Bebot - Robot Synth, v2.1