Yes it works on mobile but is a bit slower, we want to continue to improve performance there. It's reasonable on a Pixel 6 pro, I'm curious which phone are you using? We'll look into the ping time.
It's a Samsung Galaxy A52s, I tried Firefox and Chrome.
Also used a TCP ping app to check what seems to be the demo server - node1.wolfia.com? Average was around 160ms, ranging from 70 to 300ish, so I guess that was the real issue!
I'm located in UK and using a 4G network. Might try it again tomorrow from work and see how it compares.