Lumin Ap on Lumin players - not so good?

Sweet Moses...jumia, you are correct! After less then two hours with my T2, the app interface is awful. You would think that Lumin would take better notice of what its end users are saying about their product. I have to believe that a fair amount of their target customers visit audiophile community forums in doing their due diligence, and if enough of them are swayed by negative comments, marketshare will fail to meet company expectations. Wake up Lumin! Great sound...once you deal with the frustrations of the interface! Roon is looking more and more attractive. 

Just work with it a bit, read the online manual. It's better than it seems at first, the biggest shortcoming to me is an outdated poorly written manual. I'm far from an expert, but I've been pretty happy once I figured out how to send music from Tidal's desktop app to the Lumin app on my IPad, where I've organized it, so I play it from there. I think the streamer is great. The documentation is poor. The worst part, if you have issues and need help, it easy for Tidal and Lumin to point the finger elsewhere.

This should not be so challenging. I bit the bullet and signed up for Roon to feed my T2 using my iPad to listen to Tidal.  Roon is looking for my Roon Core. What the flip is that and how do I access it?!

Isn't my Lumin the "core"? 

the core is where the roon operating software sits. It can be on your computer or a nucleus or a server.

You need to connect the app to the core via ethernet or wireless.

As an example, An iPad would be an endpoint.