Here is some past work from our research group on a machine learning classifier to identify apps for kids. http://www.cmuchimps.org/publications/identifying_an

Here is some past work from our research group on a machine learning classifier to identify apps for kids. http://www.cmuchimps.org/publications/identifying_and_analyzing_the_privacy_of_apps_for_kids_2016 http://www.cmuchimps.org/publications/identifying_and_analyz... The title, app description, screenshots, and icon give a lot of signals as to whether an app is targeting kids or not. In particular, icons and screenshots that use a lot of primary colors was a pretty good signal, though app description was the best feature.