This app was mentioned in 3 comments, with an average of 1.67 upvotes
Endless ATC is a great little app.
More realistic: https://play.google.com/store/apps/details?id=com.dirgtrats.atcradar Only Amsterdam Airport for now though.
[https://play.google.com/store/apps/details?id=com.dirgtrats.atcradar](Endless ATC)