In the README under Acknowledgements, they credit Metrolist for base framework.

In other news, I’m satisfied with metrolist so I don’t see a need to switch, has been a much better experience than spotube even before their refactor cuz of Spotify lawyers.

I just use Fennec on android

Idk how many people I have met who don’t know what windows is despite using it for years. For them it is Mac and PC (pc meaning windows), anything outside of that is black magic or hacker stuff.