Before I could access my media server with the iPhone app. Then all of a sudden I was forced to register for a Plex Pass to be able do this.
For me at least, that made the whole app unusable.
Yeah there's nothing about Plex or any apps that requires a Plex Pass. When an app for a new platform is in beta it is put behind the Pass, but that's it.
For iOS, they actually require Plex Pass for syncing, which is kinda a shame as I, the server owner have it, but why should my users have to subscribe?