I bought the app as I have it on my PC but Im a little badly surprised : no synth (only samples) and the only way to modulate parameters thru automation is to record (no post manipulations). And effects are not terrific (no cutoff on delay, no chorus, no phaser, etc). On the good side: the step sequencer is very fun to use on the iPhone and mostly due to the fact that notes are customizable for melodic instruments. And export to MIDI and FL is a unparalleled good thing. Xenon groove synth is much affordable and as powerful and even more. But ImageLine may propose updates soon as on PC (free and sometimes dramatic improvements). I hope.