When my 3 kids were teenagers (though younger than 18) I had an Asus Router that had pretty good access controls, I assume most Asus Routers still have the same

When my 3 kids were teenagers (though younger than 18) I had an Asus Router that had pretty good access controls, I assume most Asus Routers still have the same controls. You could actually limit internet access by MAC address to certain times of day. For all of my kids' devices (phones, video game consoles, computers) I found their MAC address in the table in the router management website and limited the devices internet access to just a couple of hours a day that we agreed the kids could have screen time. For the most part it was easy enough to figure out which device was which, for a couple I had to do a little experimenting like just cutting off MAC addresses while they were playing a game until I heard yelling (; I agree with the sentiment here that this is no substitute for parenting and having an actual conversation with your kids. But it is a tool that you can use to enforce you're rules. I caught my boys on multiple occasions playing video games late on school nights after we had gone to bed, and this was after we had discussed with them not playing games on school nights. Shutting down their internet access at the router put an end to the problem and grades came back up fairly quickly after that.