I have both apps . I personally prefer the Kaisertone App. It gives you tons of tweaking possibilities and it opens up the music , involve you more and gives a more intense experience. But the Onkyio app is also good. iI think it i matter of taste and the synergy between the app and the head gear How it works out for you i don't know . But i think you can't go wrong with both apps . The only way to find out if it is something for you, is to try it out.
Thanks very much. I shall be giving a copy a try as a lead up to trying some higher sensitivity IEMs on the S6 at my local dealer.