Everyone wants you to install their app these days. Install my app to turn on the lights, install the app to see the menu at a restaurant, install the app to read information about an archaeological site, install an app to open the automatic doors.
You will soon be unable to cross the intersection unless you manually turn the light green from your mobile phone or wait until another authorised driver does it, in order to protect the children
As you said, it's 100% the wrong approach.