The Plex app is available on almost all devices from phones to video game consoles. Below is the links on where they are available to download from.
There is a one time fee of $5 for iOS and Android devices before you can watch on said device. But TVs you don't have too. If you want to avoid this you can download the (/jellyfin-app) for more information on the JWE Network on Jellyfin click here
Click here
Click here
Click here
Click here
Click here
Click here
Click here
How to setup Plex on Infuse please click here
All Smart TV app stores should be available when you search it up on all TVs.