The down button on my Roku remote (model RC81) has completely stopped working and I have had to use the app to control the Roku device. Can I purchase a universal remote or does it have to be a Roku remote? I can not find any help for this in the support section and I am not sure what "generation" my device is.
The rc81 is wifi remote, what's the name and model number of your roku. If its a stick, it will need a replacement wifi remote. If your roku accepts IR commands too, then a cheap universal remote would do. It turns out yours is a stick and its 3600 or 3800 this wifi remote would do: