Single stream. A single user Apple Music subscription allows for one stream of music at a time. However, Apple HomePod users were, for a time, enjoying the ability to stream to the big-speaker device in addition to another Apple product (maybe a phone)….at least they were. Apple has quietly adjusted things so the HomePod falls into the same single-gadget streaming rules. Now, apparently, if you stream through your HomePod with your single user Apple Music account, you can’t also stream through an iPhone.