[3][4] The Korean government required its installation on the smart phones of all users who are under 19 years old, and the app allows the children's parents or guardians to monitor their online activity and block access to various websites.
[3][4][5] It has a built-in key logger that will alert parents when children use words from a blacklist, such as rape, kill, pregnancy, suicide, or bully.
[4][6] It also monitors the user's location, usage time, what apps they use (giving the parents remote ability to uninstall them or power down the phone) and what websites they visit.
[6] An activist organization, Open Net Korea, has called the app the equivalent of installing surveillance cameras in teenagers's phones, without public consultation, and is challenging the regulation in court.
[9] In early November 2015, reports of serious security holes caused the Korean government to withdraw its support for the app and instead suggest using alternative services.