@BinaryBard Wow, thanks so much for the detailed advice! 
Okay so I’m definitely gonna try setting the DNS to CleanBrowsing’s Family Filter asap. But just to make sure, does that work even if my kid uses incognito mode or a less common browser? And about those third-party apps like Qustodio or Net Nanny – do they track SMS or calls too? I kinda need to know everything just in case 
Sorry for the million questions!