Good luck. I want you to know that it can be very reliable in a healthy network - this should be your baseline and expectation level. (It’s easy to get a different impression when reading all the problem reports on the forum - but users who don’t have problems usually don’t report this fact).
I started using Roon 5 years ago in my old home and later moved to my new home (with a somewhat different network architecture) and I have never, ever experienced a problem with device discovery, dropouts, or similar.
Fun fact. I connected my iPad via hotspot with my iPhone and now ARC works on the iPad. Certainly not the solution, but it hints to different handling of the security settings on the iPhone and on the iPad. Security setting are however identical.
Will wonders never cease. I reinstalled Roon for iPad this morning. While it apparently was balking connecting to the Roon Server on my laptop, I gave it a while, came back to it, and it was showing the Server. The connection works now. I don’t know what kind of gremlins led to such a beastly problem. But now I’m listening over my residence’s WiFi; no TailScale needed. You were right that it should just work, as Apple famously says.
For the record, though, I sure hope this continues to work without fail. Fingers crossed!
I have Roon ARC on both my iPhone (though I don’t use it there) and on my iPadPro (5-th gen.). ARC fits the iPhone screen natively. It doesn’t scale for the iPad, like a number of other apps that don’t. However, I read after yesterday’s WWDC that the upcoming iPadOS 27 will have a feature to scale up iPhone-size interfaces to iPad size. Since the iPad Public Beta is at least a month away, it remains to be seen if this really works well. And it also remains to be seen whether or not Roon might redesign ARC GUI for iPad screens. I haven’t seen Roon ARC on a non-Apple tablet, so YMMV if you’re not on an Apple device.
Another fun fact: connected my iPad via VPN and all of a sudden a windows up seeking approval to search in local networks. Granted and now ARC works. New entry in the Roon arc app on iPad now shows local networks access. Be it as it may, I should not question success…
Well that didn’t last long. A few minutes into it, game over. Oh well
After months of ARC working fine via my iPhone but not my iPad, I’ve been following this thread, tried this tip and it worked for me too. Thanks for sharing!