This might be a workaround for some Android users to get Trueplay without having to borrow an iPhone. Not an inexpensive workaround, so it's up to your own cost/benefit analysis. Buy the cheapest iPad you can find. I found a discontinued model on sale. It works for Trueplay and has now become my sonos controller. It sure was a lot cheaper and less hassle than switching to iPhone. Plus, I get to dip my toes in the Apple waters FWIW.
Hope this helps someone.