Hi @Unionman59,
Welcome, and thank you for posting here at the Roku Community!
The Roku app functions only when paired with the Roku device on the same network; thus, you must ensure they're not on the same network to turn off pairing. Also, you can try to uninstall the app to clear the cache on your mobile phone; this will disable your Roku app remote feature from accessing your device.
To learn more about the Roku mobile app's functionality. You can click here.
Warm regards,
Janadee
Nadee K.
Roku Community Moderator
