There are a number of apps that detect which apps do this, we have made one ourselves too that even scans every new app you install and immediately warns you if

There are a number of apps that detect which apps do this, we have made one ourselves too that even scans every new app you install and immediately warns you if there is some intrusive ad network present in there: https://play.google.com/store/apps/details?id=com.appspot.swisscodemonkeys.detector https://play.google.com/store/apps/details?id=com.appspot.sw...