I've used the Kodi app remote. And I originally bought the Harmony hub thinking I would use an old cell phone or tablet as the remote. But I found I much prefer physical buttons.
This is the kit I'm using: »
www.amazon.com/Logitech- ··· 0BQ5RYI4One in each room in fact. That tiny little remote has the perfect amount of buttons, and the wife-approval-factor is extremely high.
But harmonys generally only reproduce the key presses from the original remote, and it looks like the nvidia remote doesn't have enough buttons to cover the essential kodi functions for me. If anyone has used that combo, please let me know.