How can I allow an app on some devices and not on others?
Example: We have a Roku Streaming Stick in our master bedroom. We want to have access to #YouTube. I do not allow my child to watch YouTube unsupervised so I do not want him to have access to YouTube on the Roku Streaming Stick in his bedroom.
You need to create another Roku account(s) using a different email address.
Then you need to unlink a device(s) from your current account at https://my.roku.com/account, and link it to the new account(s) using the email address of the new account when re-activating the device.
Be warned that if you use any Roku Pay-based subscriptions, they wont transfer to the new account(s) - you'll either need to add additional subscriptions, or cancel your subscription and subscribe directly from the service provider.