Text:
I consent to Plex to: (i) sell certain personal information (hashed emails, advertising identifiers) to third-parties for advertising and marketing purposes; and (ii) store and/or access certain personal information (advertising identifiers, IP address, content being watched) on my device(s) and share that information with Plex’s advertising partners. This data is used to deliver personalised ads and content, ad and content measurement, audience insights and product development. Your consent applies to all devices on which you have Plex installed. You can withdraw your consent at any time in Account Settings or using this page.
Soure: https://www.plex.tv/vendors/ (Might have to clear cache)
Can also read about the changes here: https://www.plex.tv/about/privacy-legal/
But not Fire tablets (kids profile) or Samsung TV or many others that Plex currently supports.
JellyFin android phone app's UI is a little weird at times, but does work pretty well for me.
...
What I would adore from any app would be an easy way to upload specific content and metadata via SFTP or to blob storage and accessible with auth (basic, token, or cloud) to more easily share it with friends/family/myself without having to host the whole damn library on the Internet or share my home Internet at inconvenient times.
Client-side encryption would be a great addition to that (eg. password required, that adds a key to the key ring). And of course native support in the JellyFin/other apps for this. It could even be made to work with a JS & WASM player.
on the tablet it should work fine in the browser. maybe that would also work on the TV, that's exactly what most TV apps do anyway.