I have been using a product called ESET Parental Control for android. With this on the device, you can set allowed hours, apps, sites, etc. It has the ability t

I have been using a product called ESET Parental Control for android. With this on the device, you can set allowed hours, apps, sites, etc. It has the ability to set duration of usage, and allowed apps 'regardless of time frame/other rules'. It has a location tracker and also allows emergency calling/texting to set numbers no matter what. While I do not advocate for censorship at all, in the case of my kid, without this app he would be using the devices at all times no matter what the rules and limitations are. This helps give a better piece of mind and technological aid for the parent. It's not entirely fool proof or without its downsides, but I also do not use it as a spying tactic; merely to limit device usage and applications.