Thank you for starting a thread on this!
I can't use the app you've linked to because I don't know the tracks it offers me as references, but I hope it works well for other people.
There are so many sorting apps ... and all of them that I've tried so far are good at finding me stuff in the same genres as things I like, but that's something I can easily do for myself, and are terrible at finding me new things that I actually like. Like zero per cent. More algorithms very welcome!