I had a similar experience as you. The Muzo app is horrible and I could never get it to work on iOS, but ran okay on my Android phone. The only other recommendation they had was Bubble but that is also Android only compatible. Using a SD card was not a very good experience either.
I enjoyed the various options the DAC offered and it sounded really good. Support was good in terms of responsiveness, but they could never completely resolve my issues. Even after a replacement was sent still no acceptable wireless streaming. So back it went.
I enjoyed the various options the DAC offered and it sounded really good. Support was good in terms of responsiveness, but they could never completely resolve my issues. Even after a replacement was sent still no acceptable wireless streaming. So back it went.