Hi @Igglefan,
Welcome to the Roku Community!
We understand and appreciate you reaching out about this setup. You can actually set up your Smart Home app on different devices as long as you use the same credentials.
For better understanding and detailed information, visit our Support page.
If you have any questions and are in need of assistance, please keep us posted.
All the best,
Chel
Jecheal R.
Roku Community Moderator