Qustodio

The majority of the parental control software is designed for Windows users, however, Qustodio (pronounced "custodian") is accessible for Mac, Android, iOS, Kindle, and Nook.

One of the most complete parental control programs available, the free version allows you to create rules and time restrictions, as well as block pornography and other inappropriate information. You'll also receive SMS tracking, social networking capabilities, and per-app restrictions if you upgrade to the premium version. Qustodio is the finest free parental control software because of its extensive capabilities and compatibility for a variety of platforms, but there are a number of other outstanding free applications available, some of which may be more suited to your specific requirements as a parent.

Detailed information:

Price: $0 or up to $137.95 Annually
Content Filtering: Real-Time

Link: https://www.qustodio.com