@Davy Wentzler , this is such an impressive piece of work and I really do hope you're proud of what you've been able to do so far. Without a shred of shame, I bought the app, both Toneboosters DSPs, and the MQA add-on...and now I just look at my Monolith 788 Desktop and Opus#1 wondering when they're going to get used next because the sound out of my OnePlus 6 is back to being awesome again. Didn't think there would be this much a difference between Android's sound processing and the HiRes codec nor between Poweramp 3 and UAPP, but I'm completely blown away. Just...wow.
Love that you've been continuously adding features and turning around bug fixes as quick as you have as well. Please count me in if you need someone to beta new features. Would love to be able to help out if I can.
I also really hope Spotify can understand the value UAPP adds to their platform if they just release to you the information you need to incorporate it. Tidal, Qobuz, and GPM are definitely getting some market share from Spotify's reluctance.