The MM Guardian Parental Control app allows parents to block unwanted incoming calls, texts, and will disable certain apps on the phone.  You can even use GPS to locate your child’s phone using a text message.  Another benefit of the app is that it allows you to limit phone usage as well.

You can also gets reports on usage and it can help you to reconcile a high bill on your child’s phone.  This app can be downloaded at the Google Play Store and is widely considered one of the best apps for 2016 for parental monitoring.