You can use it on any Roku device, but we recommend using it on an external device, not a Roku-powered SmartTV. Why? Because EarnApp needs to be active for you to make money. On an external device, it can run while you are watching something else on TV, or while the TV is off. On a Roku-powered TV, in order to earn money your screen needs to show EarnApp, so you won’t be able to watch anything else!