Make changes in react native android and ios app

Hi Guys, I want to make some changes in the app. I will provide source code for this app. It is made in react native. I want to add these feature to this app. 1 - Auto Renewal subscription after 7 days free trial for android and ios. 2- Adding icon and change of app name and app package name for android and ios .(i will provide icon) 3- adding banner and interstitial id for ios and android 4- providing apk(android and ios) and source code after adding all these features.