we used many free one first, then bought "Time boss", it was ve

 we bought a  LINKSYS EA 7500 connected with the modem, it works very well.  You can also try KIDSWIFI...  I found the investment for those parental control were well worth it.  btw, I also bought a safe to put the modem inside.  ( trust me, it was needed)  good luck with the battle.