Doug from The Sound Test Room posted an in-depth video of Egoist for iOS earlier:
http://www.thesoundtestroom.com/egoist-epic-guide/

I’ve gotta say that this is probably one of the most fun apps I’ve used. Totally worthwhile impulse buy. I haven’t tried hooking it up to my OT yet, but if I can figure out a way to send it tempo/transport (and maybe midi CC) without note data so I can use the internal sequencer, this might become an essential app for me…and if nothing else, it’s probably the most fun I’ve had sitting on the couch and jamming in quite some time. It’s no match for the OT, but it gets points for simplicity and fun. I’m finding it much easier to bang out patterns and combine them into workable tracks than the OT for sure, just because of the interface. I had more or less abandoned the computer as a creative tool by the time this was released as a VSTi, but going from my previous experiences, I think the Sugar Bytes apps on iOS are far more useful and interactive than their computer counterparts, especially for Elektronauts. Worth the $20 for sure.