Android Phone monitoring app

I want a Android Phone app to be installed on Kids Android Wrist Watch . The Android app will be a kids monitoring software that I can install on any android device. It should have the below features. [login to view URL] Remote Monitoring: This will allows me to call from a particular number to the Kids Android Wrist Watch. I can hear the sound around your child without his awareness. So that if I call but my child doesn't answer, this function may help you be in ease mind. After the app installation if I want to instantly listen to target phone surroundings in realtime using my own phone then I need to simply enter my phone number inside my website online account and then call target phone from my phone when it is not in use to be patched in so I can start listening [login to view URL] installed on target phone, add my monitor number to the settings on web portal. This is simply the phone number I will be listening [login to view URL] will be done inside my online dashboard. Simply I can make a call to the phone whenever I want to listen through its microphone. The target will not ring or show any signs of an incoming call, but will answer and turn on the mic immediately so that I can hear the sound around the child. [login to view URL] app should be compatible with Android OS 4.0.3 - 8.1. [login to view URL] a page on my website(I alreday have a website) . After the app installation user will be redirected to this page then user have to agree with few terms and condition to use and they can set the monitor number there. My budget is $ 200