This app can be used to control your child's phone or tablet as long as it is on a local WiFi network. All you have to do is download the app to their devices and then enable the service to be able to control it. The app is normally priced at £1.39 but is currently available for free. I'm not sure if it is a limited time offer or whether it will be free permanently. Only available for Android users in the Google Play Store. You can download the app here:Please Log In to view this link!