Yes, but you can't use it as a mobile webapp because there is no extension on mobile browsers. Primal allows sign-in only with extension not direct enter of private key

Really? I'm jealous :) I can do anything on #primal, as long as I don't click on "Post" or "Follow". Those two buttons are clickable but empty, on every browser for me. With Alby or Nostore extensions, permissions granted. What the...