Create a base security level in open DNS, and turn it on/off/modify using the phone app.I created an open DNS account, and configured the default security level (without time windows) to custom, and selected everything... totally locked down.
Next, I configured a time window for normal use on the computer, and selected a low security level from morning until evening.
Whoever uses the internet outside of the time window will get DNS error messages.
Next, went to the phone app network map to find my kids computer. Who's where you lock it in, or loosening up; click on your kids, computer.
Go to filter level, and select default filter on router, next restart the router from the phone app.
You can change the security level on the fly to Open up the computer.
Just remember, if you go in the opposite direction, (to lock it down) you'll have to reboot the router every time you make an adjustment in that direction.
The system is fairly limited, but I've shown you a way to make it work… And it does work.