Thanks. I did ask PS A. They are basically counting on Roon to drive the thing. Volumia won't work for me, it requires Raspberry or Windows.
I know Aurender has great software and I might end up there at some point. Currently using Lumin. I have PS A's DSD Mk2 DAC, which I think is superb. I want to try the I2S interface. Aurender is USB like my Lumin.
Yes, DNLA / UPnP, but as I understand it that doesn't necessarily mean it will reside on my iPad and direct the stream to my streamer. Still checking these apps. out.