Sonic Defender
Headphoneus Supremus
I travel with my laptop, which I've semi-tricked out for audiophile purposes, but usually hotel Wi-Fi is crap, so don't listen through my phone; I listen through my laptop.
Anyway, It's no bother. Have no interest in bucking the system.
Yah, that was stupid of me not to think about laptop over desktop, I often use my laptop. I'm sure that is why Tidal doesn't do a PC offline mode as it would be a lot easier to crack. I wonder if Tidal running on a rooted Android is more likely to give up it's secrets?