One alternative for parents who have kids and are allowing them to use connected devices is CIRA's free family-oriented DNS servers which are free. My caveat is that I have not tested it so I don't know what its capabilities are. My suspicion is that it may not filter out social media sites, but I could be wrong.
It appears they have iOS and Android-specific apps to be downloaded on a per-device basis to maintain your control. Use at your own discretion and risk.
https://www.cira.ca/en/canadian-shield/