A dedicated gateway or apps on each device? The trade-off is coverage and robustness versus portability.
A box that sits between your internet and your family.
Controls installed and configured on each device.
Software scales with effort; hardware scales with the number of devices in your home. Guardian-CORR's gateway covers everything at home with zero per-device setup, and pairs cleanly with built-in OS tools for devices that leave the house.
Plug in the gateway, create a profile, and every screen in the house is protected.