Seen quite a lot of hate for Jplay in the thread. Expensive for Upnp, rip-off, and the like… a bit simplistic IMHO.
Come on… you are putting on a dedicated Roon server to listen to your subscriptions and stuff you have on your Nas, which usually has a free DLNA or UPNP server. And you basically pay another subscription fee for listening to your subscriptions and owned music….Same with Jplay but without a server and far cheaper…
And it is fast!!! Reacting faster than my Roon. Much better than Audirvana which basically cannot handle any library size still… Jplay indexes my Nas in no time compared to Roon. And I know people are again going to say that it is my fault that I do not have fiberoptics throughout the whole household with a half dozen of high end Ethernet converters and audiophile switches and silver network cables and at least the top of the line Nucleus or a Mac Studio as a core… 
Roon has not fixed the iOS freeze issue in quite some time now… and it costs… a lot… but yes, it sounds better still in my setup than Jplay. But don’t knock something like Jplay which brings easy Qobuz and Tidal to so many older and newer devices… It is really good that MConnect is not the only alternative on iOS anymore. And it is so close in sound to Roon, it could be a preference issue and in many setups probably not noticeable.
Competition is good.