Let me preface this by saying I have nothing to do with this app.
This is a great app, it allows you to schedule downtime/lockouts for any app on any Android device, and since I have a tech savvy 4 year old who LOVES the NVIDIA SHIELD, I thought I'd give this a shot.
It works locally and when you are off your home network. I strongly recommend this app for anyone with kids, who require a break from the gaming and videos on Android TV.
Does it have controller support or do you have to use a mouse?
Just downloaded this for my kids tablets. Looks good.