That’s the elevator pitch for the Cantata Haptique RS90 universal remote (€349/$406): Based on an Android platform, the RS90 promises to do everything a top-of-the-line Harmony could do, plus far more ...
The simplest fix for a freezing Roku is a system restart, which clears temporary data and refreshes the device. From the Roku home screen, scroll to Settings at the end of the menu and select it.