No problems with the app whatsoever. I use Nordost Brahma on my Zenith Mk3 with good results.
On USB Intona Reference plus Isolator have proven to be the gold standard. Use the shortest possible cables. I have a Ginkgo isolation platform under it: very worthwhile.
Pay special attention to your ethernet connection: consider Etherregen plus additional filters unless you can go fiber directly into the Etherregen.
Enjoy!