simple android app to add DNS to phone

i want a simple android app that will add DNS to phone. when user install app he will see a button activate ( when it will be clicked then app will add ip from this link [login to view URL] to phone DNS - for all networks mobile and wifi) [login to view URL] button activated is clicked user will see a popup to enter a password then he can deactivate dns only if he know password [login to view URL] in app home screen will write how much time app has been installed (also date time of last installation - i think when user install app to create a file with temestamp in a hidden folder so it can get info from there) 3. also if possible to show how many times app have been uninstalled .(it will count how much timestamps have on that hiden folder that means how much times app have been installed) so user canot change dns if app is activated , u need to do something so app to check if dns is changed and also to start on phone start for what i will use app": parents can install in childs phones and when they activate the dns there will be blocked some sites and only parents can deactivate it coz just they know the password, and they will see where the last time was installed the app so they will know if childs uninstalled it I WILL CHOSE LOWEST BID