Tidal Masters are currently only available through the Tidal desktop app and Roon - Not sure if the Roon app for iPhone will do the job.

Cheers
Tom

Main: G61SL, 218, HD621, 2*7200SE, 7200HCSE, M6s, DSW, Apple TV 4K, NUC (Roon server)
Secondary: Wiim Pro, 3200, Audio Core 200
F80