I have what is probably a bit of a dim question, but…
I’ve been happily using Plexamp for months now, whilst my wife has been cursing the Android Plex app!
Before committing to purchasing a second Plex Pass for my wife, I’d like to confirm that if she gets a Plex Pass, she will also be able to use Plexamp on the same Plex server that we have running at home?
She currently has a (standard?) Plex account but has not paid for Plex Pass.
If the admin of the Plex Home has an active Plex Pass subscription, all members of a Plex Home (both Managed Users and regular accounts) will be able to use our regular mobile Plex apps from the various app stores without doing a separate one-time, in-app activation purchase.
Add her as a user to your Plex Home. She will inherit your Plex Pass capabilities without having to purchase a separate Plex Pass.