Nope, I do not have a plex pass. I simply connect to my own Plex server.
Sure, with a plex pass I could set up multiple users who would each have their own profile when connecting to my server, but I built my server to be used by me, when away from home, so only need the one default profile.
I have not paid a cent to plex, and the android plex app does not require a plex pass to use with your own server. Clients on other platforms do, but not the android one.