@Nckee
You can share subscriptions between Roku devices/RokuTVs when they are all linked to the same Roku account (email address).
From Settings/System/About you can see your email address(account) that the device is linked or registered to.
Not sure what you mean by "roku ready".
If it is a RokuTV in a den, then you can Factory Reset it (Settings/System/Advanced System Settings/Factory Reset), and then set it up through the same email address you used for your Express so it is linked to the same Roku Account. What is available on one, will now be available on the other. Any changes you now make to one, will also be made on the other, including adding or removing Channels/apps.
If the TV in the den is a smartTV with only the Roku Channel app installed on it, then you are limited to only the content on the Roku Channel (free Live TV and free on-demand content library). If this is the case, you can purchase a Roku device for this smartTV as well, or maybe just subscribe directly to the Subscription provider directly, rather than through Roku.
If you subscribe directly to your Subscription (rather than through Roku), that will usually allow to install the app to both your Roku device and other platforms (laptops, other streaming devices, smartTVs, etc) without the need for additional devices or linking to same account.
Roku Community Streaming Expert
Just another Roku user... I am not a Roku employee.
Insignia RokuTV, Ultra 4660, Premiere+ 3921, Express 4k+ 3941, Streambar 9102
