He should work with the folks at Princevault, Prince Tour History, or even Sleevographia to get things right.

I don't use any streaming services (audio or video). The music I won't skip is added to iTunes/iPhone. If I'm at home, I rarely listen to music unless it is on the computer (great speakers, so not an issue). I have an iPod hooked up to the home theater, but have only used that feature once in 3 years. I'm sure the idea would be great for those that use Tidal -- but unless the estate is going to be providing Tidal with new music, I'm not sure why anyone would pay to use Tidal at this point. It has always seemed shortsighted to me to pay a monthly fee to stream, rather than just using that money to purchase the music you want. It's like renting furniture. Best case scenario is giving my money directly to the artist -- whether via a pledgemusic campaign or at one of their shows.

Also, with technology constantly changing, who is going to update it for iOS when they make changes? Seems like a lot of work for likely very little benefit to the developer.