My home library is shared from my server to several devices in the house. Distributed audio is handled by analog and USB inputs to my trusty Pioneer Elite SC-79 home theatre receiver. The USB audio is used only in the main zone, the home theatre area. The analog is used for a second zone output to five different rooms using a distribution system. All can be managed using either the iTunes Home Server combined with Apple's Remote app, or using DLNA handled from the server using Asset uPNP from Illustrate.
My mobile listening device is an iBasso DX160 digital audio player. It uses an older version of Android OD (8.1) but since it is dedicated to just being a player this is more than sufficient. My current favorite headphone pairing are the KZ ZAX that fit just right and have a great sound signature for my listening taste. I have several player apps installed, it depends on what I'm doing and sometimes just my mood which one I use.
I have posted some reviews of these here for reference.
My work phone is an iPhone 12. It gets the job done, but isn't as flexible as Android. Yet surprisingly there are still some really good player apps that break the standards that Apple has established. Maybe I'll review some of those in the near future.
EDIT: I have started an iOS music player thread here.